Ritchey–Chrétien enjoyers thread

[harsh matrix]

All that size change for only 3 or 4 mm of distance change.

And after all of the stacking with flats that I did, I found the gradient within the crater to be dominated by the flats and not by the direction of the gradient in the lights

The natural light pollution gradient is darkest in the top left corner and brightest in the bottom right

Yet with last weeks flats, it seems to go from brightest in the top left to darkest in the bottom right if you look at the crater, despite the LP gradient being near identical in this stack.

There's another field non uniformity too that graxpert isnt correcting and this non uniformity is identical across all stacks with a bunch of different flats.

I cant include yesterday morning's flats, even sky flats, in this statistic though because neither set did anything to calibrate the stack.

[vapid patio]

Any good targets in the Milky Way region near Orion that I can do until M 51 rises

And why does phd2 pick the tiniest stars in the frame compared to the bigger ones?

[harsh matrix]

Normally the cores of the biggest stars are blown out

Can't guide on maxed out pixels

[harsh matrix]

Rosette nebula

[vapid patio]

I see

[vapid patio]

Oooo fancy choice

@harsh matrix do you have a photo of your guiding settings?

just curious

Why 😔

[harsh matrix]

No

Wouldn't be helpful to you either.

Im running an EQ6R Pro for my RC now

[vapid patio]

Isn’t your harmonic broken?

[harsh matrix]

No it's fixed but I am skeptical of it being able to handle the RC's weight

I only run my quattro and my cat on it now

[vapid patio]

I see

Fair enough

@harsh matrix out of all these photos does anything look completely out of place.

I am guiding at horse head to be fair

[harsh matrix]

Did you set the focal length in PHD2?

[vapid patio]

Yes it was off by 10mm

[high aspen]

up so late cygnus is starting to rise 😭

(still cloudy)

im waiting for the clouds to piss off

[vapid patio]

Southern hemisphere?

[vapid patio]

Is that catastrophic?

[high aspen]

north

(rise on the side of the green line i can see

entire other side is covered )

[harsh matrix]

Im going to say your seeing sucks then

[vapid patio]

Astrospheric says it’s fine

[vapid patio]

Nothing wrong with my settings?

[harsh matrix]

Not that im aware of

That exposure time is a little on the long side but that's really it

[vapid patio]

One second is too short it jumps too much

[harsh matrix]

Also astrospheric's seeing forecast is incredibly inaccurate.

[vapid patio]

Aw man

How to tell then?

[harsh matrix]

I wouldnt follow it

[harsh matrix]

Guiding really.

My EQ6R does 0.2" RMS on very stable nights

But on the worst nights it can be over 1"

The real question is, are your stars elongated or just big?

I trust my mount more than the forecasts these days

Ive also had astrospheric say I have >5" seeing at times when my seeing was around 2", aka some of the sharpest conditions possible here.

[high aspen]

no wind? but ther is wind, the mount can feel it

[harsh matrix]

i dont have windy days very much

even when it's windy my mount has handled it surprisingly well

[tight lodge]

#1298026179638329375 message

@harsh matrix Did you removed the files?

[frosty shard]

Just got back from a massive data haul

[high aspen]

light poklutuin :(

[frosty shard]

if this is light pollution then rock n' roll is noise pollution

[high aspen]

[harsh matrix]

Oh yeah I nuked that a long time ago

[tight lodge]

Ooof. i wanted to play with it XD

[bleak solar]

can I use my RC6 at -7 degrees celsius without a heat band?

[high aspen]

ya

[crisp flower]

Yes

[bleak solar]

hell yeah! Maybe I can have first light tonight

[crisp flower]

only thing u should have an eye out for is the secondary mirrir fogging up but with a dew shield ive nnever had that problemm

[bleak solar]

okay, thanks for the help

[crisp flower]

not for this 🙂

[sinful sapphire]

New telescope is here

[sinful sapphire]

It was sent in the apo packet to prevent stealing, its a beautiful reflector

[vapid patio]

just long

[vapid patio]

fair enough

i remeber that one day i got oit down to .3 somthing

[high aspen]

cut tha draw tube

[sinful sapphire]

but it doesnt chomp my stars

[bleak solar]

After months!!! Finally first light 🥳

[high aspen]

o oaky

thats good

[high aspen]

cuute

[bleak solar]

… I may have just spent 30 minutes trying to figure out why ASTAP could not plate solve… I had a focal length of 300mm saved for some reason…

[vapid patio]

@harsh matrix Ahhhh crap I had a fire going last night just enough to smoke and ofc going where I was shooting

That must have been it

Fahhh

[bleak solar]

God I love this thing

[sinful sapphire]

I kinda want to avoid solid tube RCs icl

once i get an RC it will be a truss one since theyre decoupled

[bleak solar]

Any recommendations for auto focus step sites? Mine is 20 at the moment

[sinful sapphire]

how is the focuser?

[bleak solar]

What do you mean by that? 😅
I would say it is relatively good

[quartz meadow]

made me think you got that what is pictured on the box for a second

[sinful sapphire]

Thats why I posted it here, its a genius way to keep it away from robbers

[sinful sapphire]

Ive heard its absolute ass on GSO RCs lol

[harsh matrix]

Lmao

[bleak solar]

Oh… time will tell 😅😂

[harsh matrix]

Oh yeah that focuser is trash

[desert locust]

31000 th message

[harsh matrix]

It's not very good data

You arent missing out

[runic violet]

You can have the solid tubes decoupled

[sinful sapphire]

okay yeah im kinda stupid 🗿

do you have a good video for it or is it straight forward?

[harsh matrix]

Or you can decouple it yourself.

[vapid patio]

Aye man

I love my rebranded one

[bleak solar]

Would you recommend using an OAG or just a plan old guide scope?

[runic violet]

Oag by a mile

[bleak solar]

Okay than I need to figure out how to correctly use it 😅

[crisp flower]

saaaame

[oblique charm]

such a nice FOV with the 10'' RC just 30 min data Ha

[stiff mason]

Btw how much does your stars twinkle when your seeing is 2 arcsecond

[stiff mason]

Why wouldn't you be able to it's not water it's not gonna freeze

[quartz meadow]

probably dew?

[stiff mason]

Holy sharp what is your FWHM

[oblique charm]

2.1 or so using the zwo1600mm with 2x2 bin

just got a OAG and it is the best upgrade for the RC

[silver ibex]

2.1 pixels or arcseconds?

[stiff mason]

Dew isn't an issue on the primary mostly the secondary but even thats rare if the air hasn't reached dew point which at -7 it's not going to do much also everyone should have a dew shield regardless (protects against stray lights)

[oblique charm]

yea the HFR that nina says not done any prosessing so dont know the real numbers...

[stiff mason]

Why would you bin

[quartz meadow]

maybe the sampling isnt great

[oblique charm]

the sampeling sucks on 1x1

[quartz meadow]

1 for sure

[oblique charm]

1600 has 3.8um pixels so pretty small

[stiff mason]

3.8 is small?

Bro i got 2.9

[oblique charm]

XD

[quartz meadow]

wonder how 5.7 would do with my cam

[silver ibex]

Well yeah

[stiff mason]

And I'm still oversampled

Need more fl

[oblique charm]

around 3.2....

[stiff mason]

Is that arcseconds

[oblique charm]

i think

[stiff mason]

Also tbf it doesnt look like you are oversampled even with the bin

[oblique charm]

its 2000mm FL so yes

0,58''/Pixel

[quartz meadow]

1x1?

[oblique charm]

no on 2x2

[quartz meadow]

interesting

[vapid patio]

Holy

[quartz meadow]

Im not sure but did you catch the pulsar by any chance?

[oblique charm]

sadly no

[tight lodge]

Well, I have this not so very good sub of Ha on M33 and I wanted to play around with it

[oblique charm]

seeing here is bad and a bortle 9 just live near rotterdam (netherlands)

[quartz meadow]

ah unlucky

[oblique charm]

west is just one big blob of light

[quartz meadow]

is it all flooded with LED's?

[oblique charm]

yep they replaced all the old lights few years ago

[harsh matrix]

Not very much

[stiff mason]

Like not at all or extremely small

[harsh matrix]

Almost not at all if im being honest.

There's some nights ive gone out and looked up and the stars dont twinkle in the 10 or 15 seconds im staring for.

And I mean the entire constellation of Orion

Im not looking at a planet.

[stiff mason]

Damn so if the stars twinkle violently what does that mean

[oblique charm]

Just did a super quick and dirty process of 30min per channel Ha OIII SII need way more data

[harsh matrix]

Your seeing is very very very bad

[frosty shard]

I have had no dew down to -10 Celsius without a dew shield. (Can't test further because the problem is my laptop gives out below that)

[frosty shard]

Man the Crab is probably the best SHO target

The colors are

Full of signal in every channel

[harsh matrix]

💀

i have been meaning to share my M16 data for a while now but i keep forgetting

i finally am home from work and now im going to work on both of my scopes

i may post it later tonight whenever i have some down time

[tight lodge]

This is my one single sub

[oblique charm]

Yesssss

[frosty shard]

I am so glad you did not hit it with SCNR lmao

[oblique charm]

SCNR never in my life it just deletes data man

[harsh matrix]

😩

[stiff mason]

It doesnt delete it just rearranges it

[high aspen]

its okay

[tight lodge]

It literally clips it

[stiff mason]

Idk i can always bring it back so

[high aspen]

it completely removes green data.

its in the name

[tight lodge]

if it's clipped, there's no go back

[high aspen]

REMOVE

[stiff mason]

Like whenever i do scnr i can always bring back the green make it look identical to before

[high aspen]

it wont be identical

it will have a worse snr

[high aspen]

cuuuteee

[stiff mason]

Wait mr pickles can i see your seeing on meteorblue

Ik it's not accurate but i want to see what it gives for you since you have pretty decent seeing right

[tight lodge]

i get around 2" on stacks

Sometimes higher

The lowest I got was 1.9" FWHM on a 600s sub. Sooo, lucky imaging could yield me even sharper images

[frosty shard]

I got 1.75" on a 180 second sub once

[harsh matrix]

[harsh matrix]

I got about that on a 300s sub

[stiff mason]

But i want to see meteors blue interpretation of your seeing

[harsh matrix]

EQ6R ftw

[stiff mason]

Because we know what your seeing is we can compare

[stiff mason]

Huh seems pretty similar

To the numbers you gave

And ive checked around many observatories and their reported numbers for their seeing and meteor blue is pretty close which is interesting most of the time it's within 0.2-0.4 arcsecond of the reported seeing

[frosty shard]

My god.

[frosty shard]

WFPC2 crop time

[sinful sapphire]

WHY IS IT GEEEN

[frosty shard]

IRG palette

[quartz meadow]

cause green= good

[sinful sapphire]

buh

[sinful sapphire]

hell no

[sinful sapphire]

much better

[quartz meadow]

https://tenor.com/view/reaction-my-eyes-cant-unsee-burn-gif-7225082

[high aspen]

bbbbut where green

[sinful sapphire]

i deleted it from the histogram

[high aspen]

thought so 😭

[quartz meadow]

SCNR nuked it

[frosty shard]

This is an inappropriate use of nuclear weapons

[high aspen]

prety :3c

[sinful sapphire]

i excepted more of you mr reflector

[frosty shard]

You want more? Then take the whole image. That's 60% more image per image.

[sinful sapphire]

whats your native framing sir

[frosty shard]

about a quarter of this (23.9 arcminute square frame)

[sinful sapphire]

why isnt the core super detailed !!

[high aspen]

:D

[high aspen]

the humble atmosphere:

[frosty shard]

yeah seeing here kinda sucks in the winter, but also I haven't even attempted to deconvolve it yet

[sinful sapphire]

ok-ish seeing

[sinful sapphire]

how much do you reckon

like really poor?

[high aspen]

tiny stars, what fl, 500?

[sinful sapphire]

650

the stars are tiny because very very low exposure

[high aspen]

guessed

[frosty shard]

3" FWHM for a lot of this data, stars twinkling like 60 degrees up

[high aspen]

pixel size?

[sinful sapphire]

oh GOD

[sinful sapphire]

2.9

[high aspen]

eew, you didnt get 10" fwhm???

[frosty shard]

have you deconvolved this at all?

[high aspen]

thought so

[sinful sapphire]

dont know

probably since there is no coma

im a reflector purist

no refractive elements

[high aspen]

thats like 3" seeing

[high aspen]

proof?

[high aspen]

how?!

[sinful sapphire]

because blurx probably

[high aspen]

ew

get out of here

[sinful sapphire]

i let someone run at least correct only on every image

[sinful sapphire]

okay vro you have refractive elements you cant talk!

[high aspen]

eew

[high aspen]

its better than bxt 🤮

[sinful sapphire]

whats your issue with deconvolution huh

[high aspen]

yucky

be a seeing purist and take images like this

(left is mine, panstaars is right)

i shoulda done a 3x drizzle instead of just 2x

[frosty shard]

Since some of y'all can't stand green

as before, stretch only

[high aspen]

where green?

i miss the green already :(

[frosty shard]

Me too, Tea. Me too...

[oblique charm]

Looks good though

[silver ibex]

Nice

[crisp flower]

Wout Green its lost its soul

[vapid patio]

Is this a panel?

[high aspen]

i think thats 16 panels

[bleak solar]

it is normal that pixinisht cannot plate solve my RC6 images?

[vapid patio]

Well how’s you stars lookin

The problem ain’t pixinsight

[bleak solar]

yeah... I do not have a tilt plate yet... that could be a cause

[vapid patio]

Looks solvable

What’s your settings

Might need to change parameters

Pixel size or fl off can screw it up

[bleak solar]

yeah... it aint that bad. But I will edit first, solve later. I dont really need it for SHO anyway

[vapid patio]

Well you need to solve to do spectrophotometric color calibration

Or get the seti Astro plug ins and use blind solver 2000

Was my goat

It uses astronomy.net

[bleak solar]

ah yeah... that is better.

Yeah for SHO images I never use SPCC

[vapid patio]

Ah yes I see

But still for future blind solver is amazing

[bleak solar]

I will get that

oh wait no, I already have it xD

[vapid patio]

Do you use narrowband normalization

[bleak solar]

nah, i tried it but I thought it did not look that good. Why?

after setting everything up, getting my OAG to work and fixing my guiding issues I only got 1.5 hours of total data but still! First light was a success 😄

[high aspen]

it usually is........

[high aspen]

looking hawt

nice and green :D

[bleak solar]

I am so excited to use this baby more!

[high aspen]

how much int time did ya get?

[bleak solar]

30 Minutes per chanel, so 1.5 hours in total

[high aspen]

noice

[bleak solar]

not much but I had to get up early today so I could not photograph longer 🥲

[high aspen]

understantibl

e

[vapid patio]

https://tenor.com/view/fortnite-gif-4169442390448293969

[sinful sapphire]

Whats going on here?

[harsh matrix]

Real

That's cope to avoid buying the software

[high aspen]

nope

i coulda got it but i declined the offer

[high aspen]

maybe bad reducer or astogmatism

[bleak solar]

I believe that comes from the filter offset and from not having a tilt plate

Other than that it is artistic freedom 😂😂

[high aspen]

filter offset do be mean like that sometimes

[tall summit]

wtf, my second session where vast majority of my subs are corrupted:((

I hope it a flash drive going bad, not something else

[high aspen]

i hope ur data is salvagable

[tall summit]

Nope

2nd entire night lost

I keep flashdrive plugged in to the camera, it shouldnt be an issue, right?

[high aspen]

it shouldnt

maybe condensation damage tho

[tall summit]

I dont think so in this case, its been fairly chill and dry at nights. The setup isnt even "sweating" in the morning.

I ordered a new flash drive, really hope its not a camera issue

[high aspen]

hope it isnt for u too

[tall summit]

I should have had 12-14h on m106 by now..

[high aspen]

noooo

[frosty shard]

4 panels

[high aspen]

wait whaaat

it looked like a 4x4

[high aspen]

from these 3 chunks missing

[frosty shard]

No I just cropped it like a WFPC2 image

[high aspen]

a

[stiff mason]

Ew green yucky

[high aspen]

everything good is green liar

[stiff mason]

Nuh uh

[vapid patio]

Average green hater

Green is great most people suck managing it

People shoot SHO then take out the green like come on 😭 you’re making your own pallet at that point

[stiff mason]

Sho doesn't have green

At least not a lot that it covers the whole image

[vapid patio]

Yes it does

Depends on the target ofc

First results

[stiff mason]

That first one isnt a good example look at hubble SHO hubble made it so we need to follow hubble if we want to be accurate

Otherwise like you said your making your own pallet at that point

[vapid patio]

Well if you shoot OSC what color would oiii be

It’s green ish blue

[vapid patio]

Fair

[high aspen]

not at all

[stiff mason]

No it will be red

[high aspen]

please stop making shit up

[vapid patio]

Crap I mean oiii

[stiff mason]

Wdym

[high aspen]

sho is sulphur on red hydrogen on green and oxygen on blue

we dont need to follow the artist that did hubbles colour balance

the accurate way to do it is balance it to the actual composition levels in the nebula

its not a different colour palette if you have your images more green

which is why you are making shit up

[stiff mason]

Then that wont be SHO that will be your own color pallet

[oblique charm]

What is your opinion on the script for PI the perfect palette picker and then the realistic one?

[high aspen]

no it wont

the colour pallete is which wavelength goes in which channel

thats what sho means

or irg

you could make a red irg image by making the ir dominate the image

[vapid patio]

Fair

Ladies ladies

[high aspen]

but it will be the same colour pallete as what @frosty shard was using

[vapid patio]

My point is I feel as if we see green and go “why is that there” and get rid of it

[high aspen]

its stupid yea

green is usually dominant in sho btw

your image is very accurate imo

[vapid patio]

I think we should use a good balance I don’t like completely green

[vapid patio]

Thank you thank you

But at the end of the day if depends on what they like best

Shooters choice kinda thing

[high aspen]

agreed

some people even like their ha gold coloured!

im sure people dont complain much about that tho

[high aspen]

i think i scared unid off

[frosty shard]

OG Pillars of Creation, the SHO image.

[high aspen]

so yummy looking

[stiff mason]

Huh no i was driving

[stiff mason]

Yk what lets just agree that everyone likes their own version and in astro there isnt a right or wrong

[high aspen]

yes.

[frosty shard]

Nothing against processing SHO without green (even if it isn't my thing) as long as people are aware that SCNR will ruin your data by clipping your highest SNR channel

If you want to tone down the green, stretch the channel independently

also I think one thing that bugs me about bicolor SHO is that you could get the same appearance with just two channels

[high aspen]

also sho no matter how you arrange the colours is still the sho palette (as long as sho is still asigned to sulphur to red, hydrogen to green and oxygen to blue) (which started the argument lmao )

[versed roost]

i grew up on the gold and blue hubble images so thats my idea of what sho should be haha

[high aspen]

?

[versed roost]

yes

[frosty shard]

NGC 2403 in RGB (left) and IRG (right)

[tight lodge]

But the OG has a green hue to it

Attention to what I said. Green hue not green enough to reverse global warming

[harsh matrix]

@stiff mason you asked how much the stars flicker on a night of good seeing

Tonight we have incredible seeing

They have barely flickered at all

I can see about 20 different weather bands on Jupiter by using my 8" dob as well.

Probably the clearest view of Jupiter ive had.

It was incredible.

That was at 2400 mm of focal length

1200 native with my 2x barlow

[desert locust]

we need photo or live view

[harsh matrix]

Can't live view my dob to you lmao

[stiff mason]

Can you take a short 30s video of any star at super short exposures and send it to me pls

If you got the time

[harsh matrix]

the good ones have set

i dont think im going to be able to record any of the others because of how dim they are compared to my light pollution

[stiff mason]

Doesn't matter literally mag 4-6 would work just fine

For my use case

[harsh matrix]

@stiff mason

Im surprised it uploaded

This is capella and I think it is focused

[stiff mason]

Oh damn

[harsh matrix]

But you can see how little color splitting is occuring

Thats how you know its good

Normally bad seeing = rainbow stars because the turbulence is ripping the spectrum of the star apart

But here, it's red, and it stays red.

[stiff mason]

Can you crop into it like a lot until you can see each pixel i would do it myself but compression hides pixel size if i download it also if i could have your pixel per arcsecond that would be amazing

[harsh matrix]

I wouldnt know the pixel scale

Thats with my phone

[stiff mason]

Oh

Wait thats fine cause i got just the thing

This looks just about right

[harsh matrix]

The only way to crop further is if you stabilize the video

[harsh matrix]

Yeah

That looks about like what I recorded

[stiff mason]

That is pickering level 7

[stiff mason]

Also can i see what meteoblue predicted for your area

[stiff mason]

Which is 1-1.5 arcsecond

[harsh matrix]

I dont know how to check that

[stiff mason]

No worries here you go https://www.meteoblue.com/en/weather/outdoorsports/seeing/ search the citie ur in

[harsh matrix]

not too far off from what you said ig

[stiff mason]

Can i see the full thing and not just the arcsecond

Please

[stiff mason]

Thank you

[stiff mason]

Damn those numbers for the bad layers are insane

Good

[harsh matrix]

i dunno what any of them mean

[stiff mason]

Okay so starting from the left we got blue is for dark aka night time other shades of blue are for sunset yellow is for day time and the numbers are the hour then next column its clouds low clouds middle clouds and high clouds on the next column its your seeing/arcsecond and on the column next to that is your index of how likely you are to have that good seeing (higher number is better if both are good then that a good sign) then on the next one is the speed of your jet stream overhead then on the next one is where your worst seeing layers the on the one on the left if the temperature gradient every 100m of altitude the larger that number the worst your seeing can be but not always

And then you got humidity temperature and idk what that celestial stuff is

[harsh matrix]

okay interesting

[harsh matrix]

@tight lodge the quattro is almost perfect 😩

I need to fix this big dark spot somehow

the OAG shadow top left

cant fix that

the lock screw is stripped

[tight lodge]

Isn't this the one that you changed the rotation?

[harsh matrix]

yeah after i changed rotation

look at this insane NIR sub though

this is crazy bright

5 minutes and you can see extended portions of the tidal tail

😩

a 15 minute H-alpha sub

god

[frosty shard]

meh, same difference

[stiff mason]

Hey same detail level 😁

It's a quattro just really cropped

[tight lodge]

Don't challenge him

[stiff mason]

Wasn't a challenge just an observation

[tight lodge]

Something like that can be taken as a challenge. Trust me on that😂

[harsh matrix]

this has been the hottest data from the quattro ive seen

😩

M63 and I were not totally in love with the baffle extension i downloaded from the web and subsequently did a minor redesign to, so I went ahead and remade it again

his complaint was that the ridges were too big and I didnt like it for some other reasons

this version fixes all of those problems

small ridges, and it fits snugly in the baffle tube

i cant move it, spin it, or pull it out by accident

it goes in easy and comes out easy if i need it to but it cant move on its own

I had to secure the previous one with some flocking material to play it safe

45 minutes of NIR

pretty sure this is diffraction limited big time

this is my pixel scale

and im pretty sure the diffraction limit of NIR with 6" of aperture is 0.93" or so?

[tight lodge]

What?

At 650mm I have 0.92"/px and you at 600 0.8?

[harsh matrix]

with already incredible seeing for tonight and the lesser impact of that on NIR, this is probably close to the limit

[harsh matrix]

0.88

makes sense

my back spacing is off by 4 mm rn so the focal length increase is actually too much

i should be at 660 mm not 680

anyway

im incredibly happy to no longer have a ring of death here

[tight lodge]

I did a diffraction limit calculation.
At 800nm your diffraction limit is 1.3"😅

[harsh matrix]

oh my

that's way higher than i thought

[tight lodge]

Only 0.2" difference from mine😂

[harsh matrix]

no

0.04" lol

[tight lodge]

Bro, am I completely stupid today

[tight lodge]

Yours is 1.34" and mine is 1.55" at λ=800nm
So technically 0.21" difference

[harsh matrix]

for diffraction limit yes

I was still on the pixel scale page

I fortunately appear to not have many issues here

it's clean for the most part

[tight lodge]

Ah,

[harsh matrix]

a couple weird gradients and that's it

nothing DBE couldnt nuke though

[tight lodge]

Still, surprisingly closely matched to the 130PDS

[harsh matrix]

well yeah

Paracorr on the quattro pushes my focal length up to just about the same amount as your 130PDS

I decided to try 15 minutes subs tonight with the quattro and AM5N

no counterweight

pinpoint stars

at that 0.88"/px res

quite impressive

i dont see any flop in the system now too thank god

it really does seem that it was all caused by the paracorr not sitting against a reference surface

[tight lodge]

Closely matchet to the seeing limit

[harsh matrix]

Thats not including central obstruction or the spider veins either.

It could be upwards of 1.5" for me

[tight lodge]

The CO shouldn't affect the angular separation. It should only decrease contrast

Again. Benefits of a reflector.
We can afford to block some of the primary mirror and still have enough aperture to beat a fr*c

[sinful sapphire]

i love apo killer catadioptrics

the intes maksutov newtonians are so hot

TINY central obstruction

suppppeeeeerrrr sharp

[tight lodge]

I'll pass😅

[sinful sapphire]

theyre so hot

[quartz meadow]

I'll pass as well

[tight lodge]

There's a big hunk of glass in front of it.

[sinful sapphire]

yes

dont forget your coma corrector is also just a hunk of glass

[tight lodge]

1% of the size of the one you just showed me

[sinful sapphire]

why that does matter

end result is the same

corrected flat field

[tight lodge]

Although, I always called them Schmidt-Newtonians

[sinful sapphire]

schmidt newtonians are actually pointless

the only thing they do is reduce coma (instead of eliminating it) which actually makes it easier to overcorrect 😭

you dont even gain sharpness, you lose it

[tight lodge]

I still prefer to stay away from any spherical mirrors😅

[tight lodge]

How about plain old newtonians

[sinful sapphire]

depends heavily on the newtonian

its difficult to come close to a beautiful intes MN

[tight lodge]

The one that has a parabolic mirror and a folding mirror. That one😂

[sinful sapphire]

i mean like the build quality

intes MN beat any skywatcher newtonian

but e.g. a TS ONTC

no chance the MN keeps up

[sinful sapphire]

ALSO

cassegrain newtonian

[tight lodge]

As long as the mirrors are good, everything else don't matter.

[sinful sapphire]

the spider

the meade starfinder is a great example of how a shit spider makes things worse

[tight lodge]

Replace it with a CNC machined one

[sinful sapphire]

yea

[tight lodge]

Next issue?

[sinful sapphire]

i mean yeah you can upgrade every telescope

but id argue its different from the stock one, a telescope shouldnt be considered good cuz you can make it good

[silver ibex]

@sinful sapphire That ODK is calling me

[sinful sapphire]

follow it

follow the call

[tight lodge]

A telescope is as good as its optics. Take example from William-Optics

[sinful sapphire]

a telescope is as good as its weakest (important) link

whether that is the optics, the spider, the mirror cell or the focuser

[silver ibex]

Pretty much

20" RC on a EQ5 🔥

[sinful sapphire]

the 10'' F/5 on an eq3 still haunts my dreams

[tight lodge]

Imma have a 10" f4 on WAVE150i. Where are the weak links? 😂

[sinful sapphire]

the user 🗿

[tight lodge]

Riiiight

[tight lodge]

But that's an important statement.
That means that there's not uch thing as a bad telescope, only a dumb user

[sinful sapphire]

well yes and no

if your images are shit but your equipment is excellent, the user is the reason and therefore the weakest link

if the user is competent the weakest link shifts

[tight lodge]

So the true weak link is knowledge. Not only in data processing, but in optics as well

[sinful sapphire]

celestron knows how to make a good telescope but they still came out with the powerseeker

the weakest link is never set in stone

thats why you upgrade

and well.. some rigs need the user as an upgrade

(looking at you mr woronov)

[tight lodge]

Imagine you are a parent, and your 5yo kid want a telescope.
It's nice to have a cheap option for him to play around and not put you in a 6 installments with the bank to pay it back

[sinful sapphire]

a powerseeker 127eq costs a little more than a tabletop dobsonian which is a proper telescope

[tight lodge]

You get the idea.

[sinful sapphire]

when i corrected that it isnt a zwo camera it came up with

[tight lodge]

I still like how P1 gave the middle finger to ZWO when it comes to the name

[sterile pendant]

That is so false 😬

[high aspen]

i got hvn on 850nm btw

[sterile pendant]

Why we cannot use the 620mm Cassegrain under a certain angle ?
Because the tube is an old construction (1960) and bend sligtly under his own mass (like a few 1/100 of mm)

[tight lodge]

What else do you need?

[sterile pendant]

Mecanic matter !

[high aspen]

ono

[tight lodge]

That's the easy and fun part

[sterile pendant]

Easy

No, not easy 😅

[high aspen]

[tight lodge]

You know that I use a 130PDS, right?
It's modded to hell, but that was the fun part. Figuring out and improving it to near optical perfection

[sterile pendant]

I have seen tubes bend due to an incorrectly positioned transfer bar

[high aspen]

i think replacing a 620mm cassegrains tube is a lot harder than that 😭

[sterile pendant]

I mean, you can’t generalize what you got for a 130mm to anything

[sterile pendant]

This one was 635, Newton f/3.8, this damn thing is a nightmare

[sinful sapphire]

wait im confused, what do you mean by newton F/3.8? Is it a cassegrain newtonian

[sterile pendant]

I hate Newtons more than 200mm that aren’t dobson… It is so hard to find the correct mecanic 😅

[sterile pendant]

I spoke about my own experience, this is why

Not your tube (lovely one)

What year is this mount @sinful sapphire ?

[high aspen]

biig boi

[sinful sapphire]

still confused, what mount? 🗿

[sterile pendant]

Yours

[sinful sapphire]

2003

[sterile pendant]

Damn, it begin to have some years

[sinful sapphire]

It still works really well, luckily good equipment will last you a lifetime if you treat it properly

[sterile pendant]

Impressive !
I love that old style 😎
Big white tube, black mount with huge gears

[sinful sapphire]

I have an HEQ5 pro, so the white version

the tube is also black

[sinful sapphire]

just to clarify this one isnt mine lol

[high aspen]

make it yours!!!!

[sterile pendant]

Ah, I realize this is not your scope 😅🥲

[sterile pendant]

Yes, more usual

Too bad

[sinful sapphire]

I do know someone with a really nice meade research grade newtonian

[high aspen]

why arent you covering the back 😭

[sinful sapphire]

this is old

like really old

summer old

[sterile pendant]

Why ?

[sinful sapphire]

The 130PDS isnt light-tight

Light leaks in through the back

[high aspen]

the mirror is showing and the glass lets light in

[sterile pendant]

Ah 😢😅

Sad

[sinful sapphire]

easy fix though

[sterile pendant]

Aah, also, reflections…….
Veloren know the pain it is 😭

When you make a tube, you have to think about it

[high aspen]

i use a cardboard flap

[sinful sapphire]

Why is yours transparent lol

[high aspen]

(moved out the way to show the glass)

[high aspen]

150p moment

[sinful sapphire]

lmaoo

[high aspen]

have you got any images off them yet

[sinful sapphire]

the only thing in the tube thats reflective are the mirrors

[sinful sapphire]

nope

[high aspen]

why notttt

[sinful sapphire]

clouds

[high aspen]

[sinful sapphire]

not an image of his but its the same model

they are so nice

[sterile pendant]

How much the focuser come in the tube is crazy

[sinful sapphire]

Yeah its one further flaw of the telescope

Many shorten it

I wont since it isnt in the way when its in focus

[sterile pendant]

But it may bend a bit no ?

[sterile pendant]

This mount 😎🤩

Pure art

[sinful sapphire]

Its beautiful

sadly meade went on to make the starfinder series which is uhh. certainly something

[high aspen]

a lil

[sinful sapphire]

50kg tube

out of cardboard

[high aspen]

the flocking helps a bit by increasing the width (it does on my scope anyways)

[sinful sapphire]

Not much

only with the heavier gear on it

some just replace the focuser entirely if their gear causes tilt/bending

[sterile pendant]

That is real ?? 😅😂

[sinful sapphire]

unfortunately

Meade went from (in newtonians) first to worst during that period

[sterile pendant]

This is ugly as hell

[sinful sapphire]

actually those tube rings arent the original ones

you will actually want to puke when i show you the original tube rings

[sterile pendant]

The telescope has eaten too much LMAO

[sinful sapphire]

THEYRE STRAPS.

For a 50kg 16" Newonian on an Equatorial mount that struggles with 10''

[high aspen]

one gust and thats gone

[sterile pendant]

[sinful sapphire]

Look at how thick the sonotube is

[sterile pendant]

This is really cardboard 😭😭

[sinful sapphire]

Yes... theyre horrible

[high aspen]

im allergic

[sinful sapphire]

also the mirror is also REALLY thick

and therefore SUPER hard to cool down

[high aspen]

heat it up instead

[sterile pendant]

Meade, it can make it as beatiful as it is ugly (horrible)

[sinful sapphire]

8'' Starfinder Mirror in mirror cell

Look at it

the mirror's thickness is wider than some telescope's aperture

[sterile pendant]

Don’t tell me it is chipboard

[sinful sapphire]

..it is

though luckily they didnt sell too many of the EQ versions

[sterile pendant]

Everything is horrible

[sinful sapphire]

the starfinders were meant to be dobsonians

and even then they suck

luckily meade came out with the lightbridge series after the starfinders were discontinued

[sterile pendant]

They glued the mirror on chipboard ?!

[sinful sapphire]

yes.

starfinders are actually just horrible

[sterile pendant]

Aahahahah

[sinful sapphire]

The mirrors are actually well shaped

just way too thick

the cell is unuseable too lol

[sterile pendant]

This is illegal

[sinful sapphire]

the lightbridges on the other hand are beautiful

[sinful sapphire]

yeah... thats the entire starfinder thing..

[high aspen]

i genuinely hate this

[sinful sapphire]

The only thing bad about the lightbridges that I can tell you is

the primary mirror dust cap

resembles a trash can (and is flimsy as hell)

and the 12'' model only has 3 mirror clips lol

[sterile pendant]

I have to go, thank you for this visit of the horror museum of Meade @sinful sapphire 😭😂

[sinful sapphire]

save it for halloween

[sterile pendant]

🤣

[high aspen]

[runic violet]

Not at all close, stars are fuzzy and you aren't even at nyquist

Diffraction limited performance will only happen when your fwhm is close to the expected diff limited fwhm

[stiff mason]

Yes my telescope is always pixels size limited i can't even glance at the binning option without loosing details

And nir doesn't help at all

[high aspen]

proof?!

also whats ur appature and pixel size

[stiff mason]

6 inch and 1" which means the smallest detail i can actually resolve is 2"

[high aspen]

whats ur fl?

[stiff mason]

I didnt take screen shots

[stiff mason]

About 540

[high aspen]

yeaa i dont think you are pixel size limited

unless i misremember

[stiff mason]

Well i live in costal area so along with lots of rain we also get laminar flow

So my seeing is usually sub 2

Sometimes it does go higher but eh

[high aspen]

is 1" ur pixel size

[stiff mason]

Yeah

[high aspen]

is that 1um?

or 1 inch 💀

[stiff mason]

No

[stiff mason]

Technically its 1.1"

[high aspen]

so 1.1um?

[stiff mason]

Dude no

1.1 arcseconds

[high aspen]

i saud pixel size

not pixel scale

no wonder i was so confuzed

[stiff mason]

How right uhh well you dont need it since i already give you my pixel scale but wtv its 2.9um

[high aspen]

2um pixels will bring you right on the limit

[high aspen]

i got that after you said arcsecs btw

[stiff mason]

Yeah pretty much

Well no only daws limit which is inaccurate

[high aspen]

why, bc not accounting for central obstruction?

and actual optics

my limiting factor is actually my coma corrector afaik

[stiff mason]

My Rayleigh limit is 0.94

[high aspen]

why so high

[stiff mason]

Because it takes into account the wavelength of light

[high aspen]

what wavelenth u imaging?

[stiff mason]

Visible but the worst resolution overpowers the best so my actual Rayleigh limit is the longest wavelength i image at which is red at about 700nm

[high aspen]

ive had an idea

just image hbeta instead of halpha

[stiff mason]

Which comes it about 1.16

[high aspen]

idk if sulphur and ch4 have an equivilent

il have to check the spectrum

[stiff mason]

So I'm 2x undersampled

[high aspen]

for them

[stiff mason]

Ideal sampling rule (Nyquist) is resolving capabilities/2

So i need to be at 0.55" per pixel to fully take advantage of that resolution

[high aspen]

so still prolly around 2um

THEY NEVER ANSWERED?!

@frosty shard zwo troll

[harsh matrix]

@tight lodge I can see what you mean by not having a reference for collimation now.

[high aspen]

if it wasnt for the wind i would be able to pull of 4 minut subs

its either clouds and wind or no clouds and wind

[harsh matrix]

@frosty shard I am raytracing my RC by eye

You cant see around the secondary strangely enough

Yet somehow I have an issue related to baffling.

[frosty shard]

Well something in there still seems to be reflective? (Is that what you're referring to)

[harsh matrix]

Not sure

I dont even know what's so reflective

Ah

The primary mirror retaining ring is what is so reflective.

[high aspen]

the triangle fits in the square hole :D

some shit m101 data, some shit 24p data and some shit m13 data is coming out soon

[harsh matrix]

I need to print one more of these and then I think im golden.

Gotta paint them both and then these should do the trick imo

Im going to probably put a couple more layers of paint on that retaining ring because it is painted but it looks like it didnt get painted all that well this last time.

[high aspen]

[tight lodge]

Annoying ain't it? Suddenly you don't know that what you seeing is the primary or the secondary

[high aspen]

it turns out the wind was too strong for 8 min subs

[harsh matrix]

Yup

[high aspen]

actual data was a somewhat success

[bleak solar]

Any recommendations for a dew shield I could use?

[harsh matrix]

LOL

the crater MIGHT be dead

[tight lodge]

Custom 3D printed.
Also remove the camera from the optical train

[bleak solar]

… ah okay 😅
Yeah that was just because I was too lazy to carry it all to the basement in the middle of the night

[tight lodge]

So much smoother

[harsh matrix]

are either of these better?

2 is from November

1 is from now

[tight lodge]

The one on the right looks like you took them afocal

[harsh matrix]

that was in focus lol

round 2

right is from the end of October

panel flats for M 33

you can see the obvious baffling issue

[tight lodge]

I know😅
STF makes it look like an Eyepiece vignette

[harsh matrix]

[harsh matrix]

that's just how the flats looked man

that's normally a sign of really bad stray light management

it unironically looks like i made the 571's field more usable

[tight lodge]

You know what I haven't checked?
The flats from the cone nebula.
That was the best flats correction that I ever got😭

[harsh matrix]

[harsh matrix]

bro

[tight lodge]

The irony is that, a beginner was using my rig to image the nebula 🫠

[harsh matrix]

[tight lodge]

My girlfriend used my rig to image it

[sinful sapphire]

my god

[bleak solar]

What?

[sinful sapphire]

1. nice setup
2. holy frost

[bleak solar]

yeah it was -7 degrees or something

in the morning it wasnt all gone

[sinful sapphire]

i just wipe it off lol

well the outer part anyway

[bleak solar]

... yeah I did not think of that xD

[tight lodge]

Speaking of frost, guess what part of the rig needs mylar shielding

[sinful sapphire]

lmaoo

also speaking of mylar shielding

do you have an aliexpress store or something that sells them cheap

[tight lodge]

Amazon. I think I got 10m² for like 5€

[sinful sapphire]

DAMN

alright thanks

[silver ibex]

Do you think putting that on a pier as any use?

Main reason would be simple: it looks cool

[tight lodge]

Prevent oxidation maybe

[tulip moon]

Buying survival blankets works as well

[tidal hearth]

So sexy

[tight lodge]

Thanks

[desert locust]

what scope is taht

130pds?

[tight lodge]

Yes Sir

[desert locust]

f/5 for the win

[high aspen]

bob has infected me

@frosty shard ive had an idea, use a swan filter for redshifted galaxies to get oiii

the galaxy does have to be like 800mly away tho

(i think its 600-1000 milion)

[versed roost]

800 light years?

[high aspen]

800million

my bad

[desert locust]

vro, shoot something normal like m51

or m82

[high aspen]

ahahahah

no.

[desert locust]

you cant get me more m82 data

[crisp flower]

The coolest Thing about m82 are the Background-galaxies

[desert locust]

what about the ha streams

and ifn

[crisp flower]

Theyre okay, but the Background-galaxies are cooler

[desert locust]

then I shall get nir data i guess

[crisp flower]

And lum

[high aspen]

nir tha bestest

[crisp flower]

Agreed

[sinful sapphire]

if only seeing wasnt such a b*tch

[crisp flower]

Wish i took more on my set

[sinful sapphire]

id get a huge cassegrain and just go at the little background galaxies

infinite targets

[crisp flower]

Make it a huge rct instead

[desert locust]

I used to think like that, but I moved on

still want an rc 10 tho

[sinful sapphire]

https://tenor.com/view/disappointed-disappointed-fan-seriously-what-are-you-doing-judging-you-gif-17485289

ritchey chretiens are cassegrains

https://cdn.discordapp.com/attachments/1248873743116140586/1273203966024487003/ezgif-2-db49a54415.gif

[crisp flower]

Somewhat

[sinful sapphire]

the hell you mean "somewhat"

by definition theyre a cassegrain

[crisp flower]

But i Like them much more (speaking as someone WHO Had both)

[sinful sapphire]

THAN WHAT

ITS LITERALLY A RITCHEY-CHRÉTIEN CASSEGRAIN

[crisp flower]

Dont Scream at me

Chill

[sinful sapphire]

im not screaming

i just pressed the caps button too hard

[crisp flower]

I Just hate on sct's

[crisp flower]

Lmao

[sinful sapphire]

thats a SCHMIDT cassegrain telescope

because its corrected by a schmidt plate

same how MAKSUTOV cassegrtains are corrected by a maksutov plate

[high aspen]

lettuce move on

[sinful sapphire]

to make this more understandable
its like saying "i dont like reflectors, newtonians are better"

[crisp flower]

No?

[sinful sapphire]

it is

the newtonian reflector

the ritchey chretien cassegrain

theyre telescope types

[crisp flower]

If i say i hate sct, it has nothing to do with my opinion on rcts

[sinful sapphire]

i dont mean that

[high aspen]

thats what they meant tho

[sinful sapphire]

i mean that saying "an RCT is better than a Cassegrain" is like that

i get why you hate SCTs

[high aspen]

you ragebait yourself too easy

[sinful sapphire]

but that doesnt make the RCT not a cassegrain

[crisp flower]

U say its the Same as saying i hate reflectirs, newts are better

Its Not even Close to the same

[high aspen]

newts are better than reflectors

the so smol and cute

[sinful sapphire]

I mean this

[high aspen]

lil guys :3

[crisp flower]

[sinful sapphire]

not that you dislike SCTs and like RCTs over them, thats natural

and that should be the norm

embrace RCT

[high aspen]

i like my sustained ir performance

is it bad that my cc works best in infrared

[desert locust]

just cleared off my balcony

those chairs take up lots of spac3

[high aspen]

im shiit onion rifht

have you shot onuon hfihf

[desert locust]

your shooting onion?

lets gooo

next clear night I get im shooting some onion and more m82

and fixing my tilt

[high aspen]

we could combionoin dsta

sadly i am currenly shooting in twilight

[desert locust]

yea, we would need it too

it also has a little known oiii interor'

[high aspen]

its not showing in my subs anymore

[desert locust]

send one of your good subs'

[high aspen]

cant

not taken any yet

micro wind

shaking mount

just enough

was getting better subs in stronger 😭

[desert locust]

so you got no dTA

[high aspen]

nope

its all binned

[desert locust]

why binned

[desert locust]

dang

can you send a bad sub

[high aspen]

bc it wasnt worth keeping???

[high aspen]

deleted em all

[desert locust]

dang

[high aspen]

steam from a house is messing up the stars

[desert locust]

my next clear night is not for a week, but we ball

ill get 2-4 hrs

and the rest on m82

[high aspen]

this wasnt meant to be a bit of clear

[desert locust]

i have some clear skies tonight but its only 3hra

[high aspen]

i think i was blessed for my good data yesterday

(i probably inly have 30 mins)

[high aspen]

okay its not steam in my fov

its an obstruction

[high aspen]

PERFE-

it lies

theres no high cloud

[desert locust]

your bortle 4?

im 7

but its more like 8 when shooting into nyc

[quartz meadow]

mine is better

[high aspen]

[high aspen]

all that data is unusable btw

that i just took

too much vibrations

[desert locust]

is this tilt bad

[high aspen]

[desert locust]

is it

[high aspen]

yea

[desert locust]

dang

[high aspen]

its lightly atrocious

[desert locust]

ill fix it

[high aspen]

onion is now occluded by house

[desert locust]

can i see any subs

[high aspen]

im getting like 5% of the light

[desert locust]

just ine

[high aspen]

i dont have any way of showing em yet

[desert locust]

send me the fit

[high aspen]

im waiting for it to become completely invisible

[high aspen]

i cant

[high aspen]

its more like b5 btw

[desert locust]

why

[high aspen]

bc they are on a computer without access to the internet and no discord or anything on??

[desert locust]

oh