#Ritchey–Chrétien enjoyers thread
1 messages · Page 16 of 1
Mountainous areas are horrible for seeing unless you're on the highest peak

exactly
ill go to the highest peak there

Good luck with that
If you want to cheat at planetary you should look towards Florida, Texas, Arizona, and socal
Also urban centers are great for planetary because the air can be quite still as a result of trapped heat
Look like the Canadian bacon industry's gonna keep running their smokers at full blast until Tuesday sadly
Im already in Texas 
Wrong part of Texas then 
DFW metroplex
Yeah
Absolutely
Need to go south
Tornado alley part
Bortle 1 skies in southern Texas 
Best skies I've ever been in

Low elevation though
You gotta have bortle 1 at 10k feet
That'll blow your mind
Only a few sites in the US like that
TRUE
Unfortunately I've only been up to 10K feet in the daytime
Sierra Nevadas, Mt. Graham in AZ, Mauna Kea
Appalachians are a bit too light polluted
Oh, but when I was a kid I did get to go to Palomar Mountain
There was a winter camp there
Unfortunately I never got to see the observatories
But it was the first time I'd ever seen snow
My new observing site 
can attest

its also too humid over here...

turned my bortle 3 site into a bortle 5 site roughly
yeah
i do notice whenever I get good seeing here i get worse transparency, and vice versa
its always humid
that was super disappointing
Clearly your conditions are telling you to do only widefield DSO and planetary imaging
thank god i'm keeping my frac reduced nowadays 
I'm giving my conditions the middle finger
Aren't Madison summers supposed to be good
you lucky you have an SVX and a second one otw at that 714 mm f/7 sweet spot
real
that's a fun focal length to shoot at with an APS-C
They would be if it wasn't smoking like a joint outside
i wish i had one of those but theyre so far out of my price range it's not even funny

Canada moment
once i've got both i wont technically need to reduce, the speed will come with two scopes
however more speed is always appreciated, especially since i'll never see sampling down to 1"/px with my seeing and the rayleigh limit on them
The used market is a pathway to many items some would consider unaffordable
Svx80t and sv70s are pretty cheap
Svx102 is not that far from your RC and is basically the same price as a 10" RC
The other issue is the very high nighttime humidity in general, so you absolutely need dew mitigation for any telescope with a forward lens. My RC hasn't dewed over internally but it's often ended up dripping wet, as has my tripod and my eyepieces
though tbh i think i get better stars with my native flattener so i might not even bother reducing when i have the second one online
Haha imagine owning a SCT there
😭
especially with easier mosaics from 2x scopes
MINE DID
on my trip to the bortle 3 site with my RC8 it dewed over
but fortunately that was long after the night ended
i was honestly shocked
id never seen my RC's dew up before
My friend bought an 8" EdgeHD SCT and he's actually done fine with a simple dew heater strip
No shield?
Okay good
Got that mixed up
The strips are kinda pointless imo
Unless you are a hyperstar user
You're intentionally putting heat in front of the light path...
We've been out several full late spring and summer nights and the corrector has been free of dew
So it can't be that bad
There are dewy nights where the shield is not enough
But those are nights where SCTs should just pack up
I remember a night in Virginia Beach where my 3" f/8 spherical Newtonian on a dinky altaz mount totally fogged up, primary and secondary mirror
Or in my case, between a massive swamp and the ocean
We'd also get smoked out too due to swamp fires in the summer
And the mosquitoes were so bad that the city would have to pull out trucks to spray neighborhoods with insecticides and repellents
Worst I've gotten is Newtonian secondaries dewing in socal from the marine layer
That's it
On a 12"
Everything is dripping wet but the primary is too large and too protected to dew
That scope might have had some opening near the primary cell but that was back in 2011 or so
I don't remember
It was the hobby killer scope I started with
I'm now in Arizona so dew is a non-issue 
Unfortunately my current issue is that dew may have damaged my tripod
No marine layer, always dryer then bone
Why was it a hobby killer, 76mm f/8 is pretty good optics wise
Was it a bird Jones or on a shitty mount
Spherical, highly pinched mirror on an awful mount with no collimation adjustment on the secondary
Spherical at 76mm f/8 is actually really good
It's less than 1/6th wave rms
Probably 1/8th or so
Maybe poorly executed
Also 0.965" focuser and terrible Ramsden eyepieces with it
That.. would do it
My next scope was a Celestar 8
Night and day difference
I still have and use the Baader Hyperions I got with it
achromats can only do narrowband at the wavelength they were nulled at without any SA
they can't do both Ha and OIII too well, only one or none of them
guidescopes are not made to be diffraction limited and usually have a crapton of SA to be unusable for imaging
a semi-apo doublet will do better with narrowband since the problem is minimized
but a triplet is more likely to have decent performance at all wavelengths
I'm curious about the one I got (the Askar 52 mm Super ED)
I actually got it as a super finder primarily
that's an exception
its made to be used for imaging as well
its also more expensive
much happier with this HDR though 
it's subtle but it makes a difference
LOOK AT ALL THE LITTLE BOK GLOBULES 
the RGB stars i got are tiny
these are not blurx'd
after blurx with very small sharpening, the small ones become about a pixel in size

2.25" FWHM for the entire RGB image
the segment ill use is likely much smaller
yes the stars ill be using, aka the ones that are on axis, are 2.1" in size 
some of the smallest stars ive ever had
here it is guys
first real process of my SHO M16 data with those RGB stars
the first one im real happy with
ill sleep on it, see how i feel tomorrw, then i may post it
it takes a fat dump all over my attempt last year 
Ahaaaaa! So you had a bad attempt last year.
Next time don't clown my m16
It was my first attempt 
i wouldnt even consider it bad
i was using a bad telescope with an OSC cam i wasnt totally happy with
that was ultimately the limiting factor at the time
it's that tasty resolution im talking about though
that's what is significantly better
i have twice aperture
now you can blink between this year's and last year's
my frac had some really weird optical defects too
so there is some amount of image shift and the stars arent in the right place... if that makes sense.
The colors in yours from last year are a bit more saturated than mine
id say mine are both about equally saturated
it's more down to the color balance i opted for
also i simply just didnt have as much Sii last year
thanks to using an OSC cam with already bad Sii QE 
and shooting at f/7 in the same skies
Osc ewwwwww
Also, why is your OIII more transparent than mine?
it is probably down to how i processed it
i tend to process with an emphasis on depth and clarity so you will see my image appear to have more depth and transparency
that's something i tried really hard to do
it could simply be down to how saturated your image is tbh
wait @tight lodge does your image have Sii?
oh right
you may either not have enough Sii or you saturated the image too much
First option
In fact, I has so little SII and OIII that I couldn't balance the channels properly. So the trick that I did was to have the outer region in Foraxx and the core in SHO
okay yeah
you need Sii then
Next year
M16 is gone for me now🤣
Now I hope that next weekend is clear so I can get a glimpse at Helix nebula
NOOOOOOOOO
Let me tell you why I'm just skimming over these targets. They are exotic targets for me.
Usually I have a window of 2 to 3 weeks to image it, and because if my job, I can only image in the weekends.
Mostly I want to image them just to add them to my catalogue. I'm well aware they are bad because I have yo shoot them very low in the horizon and only for couple of minutes.
Once I'm done with these (Helix is the last) I will lock on a project tho
First is the Cygnus wall in NIR HO or NIR SH. Not decided yet.
Because this, really boosted my moral when it comes to IR processing
hell yeah
@vapid patio this is why ill be sticking with the RC8 lol
these were the smallest stars ive gotten in memory 
it's on the verge of refuting Whooptie's claims
technically it kind of already does 
if i can grab a focuser that isnt balls, it can probably get sharper images more consistently
i think i want to come back to M16 with my 533 to shoot a bit of NIR just to see what i get
I had really hoped to reveal a lot more structure on this thing, which i did
but JWST's data is a lot more tasty looking

i want to see if i can get those hidden stars to show themselves
Actually, the colors from JWST are wrong. They don't exist in space
Too bad I'm not verified. I have the perfect emoji for that statement 
nice try but my nebula colors are not real either

Shhhhhh. It's our secret
HUH
The "false color" is real. Because if it wasn't real, we wouldn't have detected it
I want to give that a shot soon
i can do some really cool looking palettes with that data since it's clean

id really like to get an MSGR ref for this
i feel like i could get more out of the background

hehe
Oh you meant broadband
Maybe next year
Im getting fuqed by my weather again
that is what real colors mean
True
But
Are they only real because thats what our eyes are telling us?

Yuppers
Thats some tasty resolution
My broadband stars look blocky as hell and they arent even that small compared to yours
Wtf 😭
Sitting on a mountain looking ahhh
But how about this? Technically is narrowband, but all the channels are colorized to their real spectrum color
Tis real color?
Thats what I want to do some time soon

I hate it when discord is duping my messages
Its like diet broadband
Diet broadband but on steroids 
are they though
looks like a whole lot of Ha
I saw that 
where H beta, OIII, H gamma, H delta
Well what color is SII?
SII is deep red but also very low strength

Thats it
Im getting an H-beta filter
I will have to destroy it because it will be useless
no you can just copy your Ha channel and paste it at 486nm

Or do some pixel math 
5.5nm 
I have a 10 nm H-beta and Oiii for visual
yeah i didn't bother with the 10nm h betas
Its like cheating in bortle 3 but useless here at home
do you not have a uhc
either way any of those three filters will be better than unfiltered in LP
I have a UHC yes
Which if I ever bother doing visual here at home I will use
uhc is quite effective in dark skies
Is it?
that's kinda the point of it

h beta + oiii
Oopsies 
you have them separated
if you're solely concerned about object visibility and not about structure the order of importance is 1. uhc 2. oiii 3. h beta
but that leaves out a lot of details
a lot of h beta objects are solely h beta objects
oiii/uhc objects usually have something to offer in all three filters
Interesting
Well the H-beta oiii filter made Lagoon look like a live photograph in my dob
Blew my mind
Same thing with the east and west veil nebula there
i.e. California nebula, Cocoon, Sadr region, any SH2 region
I didn't think about cocoon
Wtf
examples not up rn would be the horsehead, seagull, and flaming star
Oh yeah definitely
you see the most on the Veil with a uhc because the hydrogen and oxygen are separate features
however the oiii filter gives you the most contrast so people say its the filter for the veil, although you are sacrificing the hydrogen component
Lagoon likewise is brighter and more extended with a uhc but you get more contrast with a oiii
Crescent is far more visible by uhc than oiii
though again in b3 the contrast with an oiii may help
the darker the skies the less the contrast gain with oiii
Assuming transparency isnt too bad again
oh when i say uhc i mean like a 12nm bandpass that barely transmits both h beta and oiii
not the super broad filters
those have their own niche
lumicon/astronomik uhc being an example
Well, I can emulate them on my screen if that makes you happy
Ah
Thats pretty much what I already have
cause that wouldn't be 10nm
501-486 = 15nm at least lol
I think its 20
yes UHC in visual lingo means a filter that passes h beta and oiii and nothing else, with maybe the exception of Ha
passing Ha is irrelevant because we're insensitive to it
ok so you are already using a uhc
24 nm oops
I couldn't remember off the top of my head
Its not actually explicitly specified either
what is it
Yeah like 10% QE to those photons with our puny eyes
anyways this is not really a uhc, its a wideband or lp reduction filter
its too broad to be a uhc
The antlia H-beta Oiii visual filter.
Yeah... the IMX585 can be a pain when it comes to long wavelengths IR
That sucks lmfao
Get tricking into thinking you discovered a PN
Instead it was a quality issue with a filter 
but yeah people buy separate OIII only and H beta only filters
I would have but I didnt really have the funds at the time and I just wanted something that I knew would do the job during my first trip out there.
It ended up paying off
M42 looked insane...
Well... idk if it's bad QC. Mist cameras don't have any response to anything above 850nm. That variable Mira has its second peak at around 1200nm💀 . The 585 picked it up
Jesus
Alrighty then
Bruh I posted that Trifid on AB less than an hour ago and i already have like 5 likes on it

like i said UHC is the most useful filter in dark skies so you don't really need to
there are probably other things worth investing in first
Try one of em cringe tiktok trends
I pointed my telescope at the sky, and this is what I got 😱 😱
Instantly thousands of views 
I found something
I used an SV220 dual narrowband filter (7 nm O-III, yeah it cuts off the secondary line) in an 16" dob to see the Lagoon, Swan, Eagle, and Veil in low Bortle 4 skies, and that was probably the greatest observing experience I've had in a long time
(not counting the total eclipse of course, because literally nothing can compare to that)
nooooo 😭
i dont see the found
Why the center orange star has a black halo?
i mean
it looks weird
but normally when that happens, it's because starxterminator pulled out the surrounding nebulosity with the star and the nebulosity is as bright as the star when they were readded
UHHHHH
it has 19 likes already

posted 9 hours ago
I got 2 followers from posting it as well
MAN I wish i could have grabbed more data on this thing
it's so pretty 
YO @frosty shard @vapid patio HPS said they'll be getting more stock of those focusers some time this month!
Yippe
I will keep a look out
They said if you order one now, it guarantees you get one once they arrive
If thats the case, I may put the RC8 down for the time being because the filter offset nonsense is driving me mad 
Ill place an order soon myself
By soon, like, later today 
Ok sick I might be saving up for a 571 as I relized I dug myself into a hole with getting such a small sensor
I cant go bigger scope without bigger sensor
you certainly can but you will be living a life of pain and struggle by doing so 
the 571 is a hell of a lot of fun
im going back to my ares for the time being though as i want to test all of my filters and the 8x1.25" EFW ive yet to use
got lots of fun gear to test in the coming weeks, and i think my quattro is near perfectly collimated rn
it wil be up to the challenge

okay order placed
i am going to eagerly and impatiently await the shipment of that hardware 
i cant wait to see what this scope does with an even better focuser lmao
i will be unstoppable

i am intrested too let me know how it goes
as i wonder how much it will help fix tilt possibly your focusing curve and overalol image quality
my focus curve was almost a perfect V
and i had no tilt

oh haha
@harsh matrix any new projects
I am highly considering doing some part of the Cygnus wall rn
I want to do WR134 too
Maybe even Tulip to frame Cygnus X-1
I have a really stupid idea for something to do tonight and/or tomorrow night
but I also need to figure out why I'm getting this consistent RA trailing
If it's just due to polar alignment I'll be really upset
Do the Tulip. WR134 needs a break
I told you that's mine! 
i decided to go for it anyway

yesss
cygnus x-1 needs some love
I totally agree
@harsh matrix were you aware of Touptek's imaging competition? https://www.touptek-astro.com/Astrophotography-Contest-2025/
nope
You can submit up to 5 images per category
@harsh matrix im tempted again for a 8" newt
could you help me figure out a brand?
im kinda leaning at ioptron
or skywatcher
I would avoid all GSO rebranded newtonians
im going sky watcher
found a killer deal for 650
brand newish
Thats the safest bet for mirror quality
for sure
But they need to be modified a lot
how?
the focuser is good
i did some looking
the gso ones are trash

new i would say still in box
yes cloudy nights
he bought it used it twice and sold his mount he cant even use it
why
Their newtonian mirrors are proven to be worse than 1/4 wavelength with will be highly detrimental to the sharpness of your image.
no
but the stock one seems fine ish compared to gso ones
its much stringer
stronger
Its garbage
If that one doesnt have a linear rail on the bottom of the drawtube, its straight trash
Its so flimsy that the focuser gives you flexture
Not to a subtle degree either.
Literally different corners in your images depending on the side of the meridian your scope is on.
The version with a linear rail on the bottom of the drawtube is slightly better but still trash.
It wont handle a loaded mono set up
However, there is a saving grace to the quattro
The CYCK focuser is dirt cheap and built like an absolute tank
It is vastly superior to any other focuser you could even dream of buying for a similar price.
Im not speaking from what ive heard about the CYCK focuser either
Im using it right now

This bad boy
Could knock somebody out with it.
is it only for 150?
or all
might be dumb
and vel you have a quattro?
I was honestly shocked by the weight of it at first till i unwrapped it, all metal nothing moves i cannot wait for a clear night with it
Yes
You can use it on any size quattro afaik
Because they all use the same mounting plate style.
ah ok
and where did you order it
and what esle?
Aliexpress
You need something to put over the back of the telescope/cover the primary mirror
You could probably make that
yeah i knew that ez
You may want to grab flocking material to flock the inside of the tube
flock?
And the stock secondary spider is super flimsy
why is that a issue? i dont plan on putting a weight on it lol
Subtle sky glow is enough to nuke your contrast
ah ok yeah yeah
just on like seems and all that?
Because you can fold the spider veins with your fingers like origami paper
damn
It is too thin and too brittle for the massive mirror hanging off of it.
Backyard universe makes a solid spider upgrade
Takes it from thin aluminum struts to a solid construction
this your astro bin?
If you want to know exactly what you need to get, go look at Cuiv's journey with his quattro
No
ok
I was collimating the quattro
200 DOLLARS IS INSANE
Im not huffing copium this time, it looks like collimation is perfect for the first time in the history of my ownership of this scope 
That is the price of buying a sub $1000 imaging newtonian my dude
why did i type bee
Or any of their larger counterparts
Because they're all built just as poorly as the smallest option.
i dont see a better one out there
bru
they could mark it up 100 bucks more and fix all the stuff and still make money
If you want better, use out of the box style construction, you have to get a custom made ONTC type imaging newtonian from Europe
Apertura CarbonStar is much better
Those cost 3 or more times as much
haha nahhh
Check out Ciuve's comparison of Quatro to CarbonStar
@harsh matrix makes sense now my astro friend dropped his brand new 130pds and it broke all the spiders and it landed on grass
These corners are as perfect as I can get on a Quattro 😩
what is your astrobin
Shawn Thiessen/curiosityastro
Duh
oh cool you have some top pick stuff there
Octavio thinks one of his friends dropped or kicked his quattro
Its never been the same after that incident
He basically quit astro for the time being because of it
All because he has a bad focuser that makes using it nearly impossible.
Yes
Oh, by the way, how much will what my telescope is seeing move when I move the secondary mirror when collimating my RC?
should have gotton a rc 😔
Not very much assuming you dont somehow do 2 entire turns of a screw in under a second
And never touch the middle screw
Leave that one be
The secondary movements are fortunately very subtle and easy to control
so i heard 
Its really easy to command to where you want it to go.
my friend with the same rc as you cant collimate it to save his life. he says he barely moves it and the star disappears
perfect
maybe he is doing the middle one lol
That sounds like the secondary is loose tbh
Thats really bad if thats the case
Moving a screw on the secondary of my RC8 barely even moves the field
I can do a quarter of a turn and not even move a star a quarter of the way across my screen
and is there a good way to collimate without having to get a new software? or you swear sharpcap is the way to go
hmm good to know
idk if you tried in nina and gave up
Nina would drive me insane tbh
The reasons I use sharpcap are to get immediate feedback of my movements, I can regulate how much movement I make in real time, I can reverse a movement immediately if I think I went too far, and you have reticles to use in Sharpcap

The thing about collimating the secondary is you need the star you want to collimate on to be perfectly in the middle of your screen with minimal deviation from the middle before you make adjustments
Your initial slew can probably get you close but if you use one of the X reticles, it will show you the exact center of your optical axis.
asiair had a nice reticle and a live mode smh smh
Then you can make any small adjustments to center your star perfectly
When it comes time to collimate the secondary, you need to return the star to the center of the image after every adjustment as secondary adjustments must be done on axis.
Looks super easy to me tbh
so just hit recenter?
ok cool then it should be np
No you will have to recenter manually

i finaa fly you out i am not looking forward to this 😭
oh well thanks for the info i will try whenever my weather lets me
@harsh matrix also are lasers bad?
i swear lasers had a z
I didnt have luck using an inexpensive laser collimator, and I refused to drop another ~400$ out of principle for HG laser system
And then he had to send the Carbonstar back because of weird star flares
Dunno, its on a whole bunch of his videos?
It's good to have a laser,l and a cheshire eyepiece
Yes. He has a video about it
Bruv, my 130PDS has better stars than the carbon star. And with all the mods, is still half the price
Which is the Carbonstar?
Not to bash any gear
I bought mine mint for 500 with the reducer
Right?
it's not that bad
The one on the right is the 130PDS 😅
take it slow and methodically and remember what i told you about what adjustments to make
as well as how to identify what direction to adjust in
they are not really useful for RC's
people swore by Howie Glatter lasers but the necessary accessory to use with them is not only discontinued but extremely difficult to get your hands on
I'd say, it is useful enough to get the mirrors roughly aligned so you can later use more precise tools
Hey, noone said its not a capable scope)
Bro... people hate on SW telescopes so much 
looking at his collimation right now, it will be extremely difficult to tell by using a laser
the error he is looking at is very, very small
i could be wrong though
i do because i own one
and it fought me every single night i used it

Yeah, that's fair. But for example, you take the mirrors out to clean them and when you put them back in they are pointing to Narnia or something
You haven't modded enough then
yes that is true
brother
there aint a single mod left to do to this scope
😭
I built a diy OCAL collimator, it gets me about 85% there, then its a one or two DSI method itterations
the guy who modded it did everything to it
What is it doing?
the problem is, he had no idea what he was doing so the secondary has been way out in another galaxy
since i didnt know what i was doing either, i couldnt figure that much out until a few weeks ago
I WAS getting horrendous corners regardless of how much i fiddled with the secondary mirror
the last time (a few weeks back now) I tinkered with bench collimation, i believe i had gotten it dialed in all the way
That's literally how a cheshire eyepiece works😅
Yep
while it wasnt dialed in all the way, it was WAYYYYYYYYYYYYYYY closer to being perfect this time, so two nights of very small adjustments and now my corners are perfect on my 533 
oh i failed to mention i was getting horrendous corners with my 533

I'm surprised you had bad corners with a 533
that should tell you something
me too 
they were not correctable to make things better!
@tight lodge its just easier then peering into tiny hole while trying to adjust mirrors
It's cheaper
it is but my eyes screw with me while i use one of those
bench collimation is much nicer for that reason
you have no silly focus shift in your EYES to fight with
first 10 minute sub about to roll in
I've seen a video with someone building an autocolimator
This thing cost me like under 30$ in parts
probably gonna look rough because of canada's wildfire smoke 
but the stars will be perfect
i can promise you that much
I got my cheshire for 15$
What are you imaging?
Oh thats really cool, im going to search i need fo see this
Dude, people are dropping 400$ for HG lasers)
The autocolimator is not autocolimating your telescope
Skill issue🤣
Real OCAL is around 200$
30$ is not bad for that functionality, especially if you have RC
WR134
Aww man i knew it sounded to good to be true, was thinking like what did they do for the secondary could auto colimate the primary but was confused 😅
the sub looks as good as i was hoping (as far as stars)
the signal is honestly much better than i expected for a moon + wildfire smoke as well
It's similar to an interferometer. It's just a that it compares a perfect pattern to a pattern created by your telescope and you have to match them
full frame
Little glimpse?
aberration inspector
OIII?
The moon and smoke really make your life hard
yes
Dorito stars spotted 
Oh okay i got you makes sense
Also, I will never share my future projects with you. 
You stole the cygnus wall from me

i didnt even really do anything with that data
not yet anyway
i may toss it since i dont have trash collimation anymore
yes that's what i mean by the CC is garbage
Ratbag asked FLO about what he can expect the stock Quattro CC to correct and he received a surprising reply
they told him that it cant correct a sensor larger than 1600MM or 294
and it doesnt even correct those perfectly

I'm glad that my Baader MPCC performs better than that

that means i am SoL without an upgrade
lol, 10 minute Oiii sub on WR134 shows almost nothing

it doesnt on an F/4 newt!

i do because of bortle 8/9 hotbox
i had bad spawn RNG i guess
Can't be worse than being spawned in an ex USSR sattelite country

Yeah true
Where are you based in again?
guys
we have achieved the pinnacle of f/4 newt collimation
it only took me 6 months!
Origin, or currently? 
There was this dude, for 2 weeks straight he was like... your colimation is not good enough, do it again. So I spent 2 weeks colimating the telescope every day. Everytime I was saying... this is good enough, the guy responded with "Yeah, but not good enough. Do it again!"
HUH
Both I guess
Had to give up on imaging tonight
Originally, I'm from Romania.
Currently, I'm in Germany
Why?
Maybe there's some hope for the next weekend 
It's clear and calm. But there are too many random gusts that ruin everything
the two crumbs of data I acquired today
(120s R mapped to red, 180s H-alpha mapped to green/blue)
No RA trailing this time it seems
oh this round of smoke isnt from canada
its from some part of california just north of santa barbara
it gets sucked eastward where it enters a loop and constantly recirculates right over my head
😭
And you were clowning my bad weather😂
There will be no good weather anytime soon, I have bought a modded dlsr. Sorry people)
Did you just image an elliptical galaxy in Hα
Yeah we're all clear now here in Wisconsin
It's the core of the Andromeda Galaxy
@tight lodge did you need a coma corrector with your scope?
Just thinking like 585 sensor is so small I wonder if its a need
@frosty shard your a smart guy what do you think
I do not think, therefore I do not am
Are you asking about the coma corrector bit? I have no idea with Newtonians
But I think the 585 should be small enough that you can get away with not having one
That's what I was thinking
This might even be true without a field flattener lmao
At least with my IMX533
ik

i know a dude with the carbonstar rc8 running it with a 571, unreduced, and he gets a dang near flawless field
https://www.astroshop.eu/telescopes/asa-telescope-12n-300-1140-astrograph-ota/p,46212
@vapid patio this is the kind of newt you can buy

here's a ready made, out of the box imaging newtonian astrograph!
https://www.astroshop.eu/telescopes/ts-optics-telescope-n-250-1250-carbon-ota/p,85347
this one is affordable!
https://www.astroshop.eu/telescopes/vixen-telescope-n-200-800-r200ss-ota/p,5729
you could buy this cheap Vixen 8" f/4 newt! crap focuser included!
another affordable 8" f/5 newtonian! ONTC build
yo they updated the marketing images for the RC8 decoupler
this thing actually looks like it decouples
on the TS Optics site?
i might try to get my hands on one
telescope express
well teleskop-express
the issue this may have with my equipment though, is that this eats up enough backfocus that directly threading my reducer to my focuser will cause my camera to not reach focus
i dont know how to work around that...
Also looks like it got pushed back to December for availability
does it?
Says on the site yeah
hmmm
it says expected to be available from january of this year
Date format is reversed
DD.MM.YYYY
oh my god you are right
im dumb dumb
it's a relatively cheap solution to an annoying problem
costs half as much as Nate's custom made solution too
i like seeing this photo because it is a lot more reassuring
i was worried it would be like a copy/paste of the 10" with some not well though out choices made to retain access to the primary collimation screws
wait
they already made the instructions for installation available

okay yeah, going by the installation instructions, this is a bonified decoupler
it removes all stress placed into or on the collimation mechanism
ill definitely buy this and give it a try when it becomes available
i think any cost is worth killing this astigmatism for good
any cost that is below $500 
they included an internal baffle thing too to stop stray light
something the stupid "collimation ring" sold for these RC's for years now didnt include
BRUH
the connection is ACTUALLY direct
the focuser ACTUALLY transmits all of the weight into the primary

why did GSO think this was a good idea
actually looks premium
installation is pretty straight forward
now im excited to get my hands on one
@harsh matrix OH HELL MAH THATS A WHOLE YEAR OF MONEY FOR ME

same here tbh
if i saved every cent i got for a whole year i could buy one of those
but life doesnt work that way now does it?

Sadly doesn’t 😔
@harsh matrix I think I'm gonna hold off on my 650$ quattro I could pull the trigger on right now
Or should I? 



you should hold off imo
if you find a good deal on a used RC8
like 800 to 900, youre already spending on a scope that fixed about 90% of the problems that quattro will have
if you already buy a focuser upgrade for the RC6, then that will not be an issue either
all you have to worry about are the coupled mirrors once all is said and done
the quattro is actually a laundry list of problems
I got my RC8 for $750
and the dude paid the shipping which was 110 or something 😭
he was okay with it for some reason
@harsh matrix you forgor camera
if you reduce to 1000mm it wont be much of an issue
i know a dummy with a quattro 250p and a 585 and he gets good results when he actually tries
i mean maybe but can it even get to 1000mm
any less
mine is i would say 900
twice what i can offord i have 600
ez
just grow another 600 dollars on your money tree
i see the quattro you are looking at i believe
this one has the "better" of the two focusers that come on the quattros
another thing to look out for with this quattro is if he is including the coma corrector or not
if it even came with one
definitely dont buy the quattro @vapid patio
the 200P doesnt come with a coma corrector
so if that guy didnt buy one separately and isnt including it with the scope, you are fuqed
yes having a coma corrector is that important and the coma corrector is 400 dollars at a minimum
that's probably why it hasnt sold
not because of the price but because there is no mention of a coma corrector
the 6 inch quattro is the only one that comes with a coma corrector
the rest dont
jesus

this one sold but its proof you can knab one for cheap
@harsh matrix OK I READ IT ALL
sorry for caps
ok i wont
@harsh matrix should i go carbon?
honestly yeah
it's not nearly as annoying to move around as a steel tube scope
plus you have less weight concern for your mount
easier time guiding for that reason
is it much more money?
on the used market, doesnt matter
most RC8's are carbon fiber afaik
there arent many out there that are not
new prices, doesnt seem to change much there either tbh
but i havent actually actively looked for steel tube RC8's
oof this is a more complicated question than i expected
there are a bunch of other things that can affect the new price than just the tube
generally these turn up much cheaper on the used market
Generous dude
Fr
Turns out if you want to use an RC8 on an eqm35, you can
I have wondered this whole time
It balances well
dont give me ideas
Does it guide even remotely well
I dont need guiding for visual
I already know it can't handle an 8"
MY EQM35 does guide extremely well
But it has high frequency oscillations that make it unsuitable for imaging with long focal length scopes.
In RA specifically
The dec rarely ever needs to move
Oh visual
Yeah 
The reason I didnt buy an 8 when I first got an RC is the same reason I didnt go straight for a 10 when I bought the 8
I didnt/dont have an adequate mount.
I mean @frosty shard is about to start recommending certain subsets of people to get an RC8 for visual
If you want an 8 to use for visual on occasion until you can get a better mount, I think its worth it
Especially if you have dark skies
Aka anything not bortle 7 and higher since below bortle 7, its not as bad imo, a CLS filter helps a ton.
well that does not apply to me
im b7 and higher and i dont really plan on getting a better mount anytime soon
im still probably gonna do a 6" f/4
im just not sure if i test my luck with buying the returned gso scope
already tested it with highpoint and yk what happened
I wouldn't buy a returned one no
Those are normally returned for a reason and 9/10 times they are going to arrive at your door step completely fuqed
yea thats what i was thinking
sometimes there is a bit of luck, like i returned my tube rings cause i just didnt need them but i doubt thats very common
especially with a full scope
i just dont know what to buy tho
it doesnt look like agena is restocking gso anytime soon, i emailed them and they basically just said "idk man"
Wtf
@harsh matrix So we going rc8?
And let me see what 100mm is
And wait isn’t yours 0.65 reduction?
Yes. Don't run it without a CC
@harsh matrix Holy ouch
Eventually you should
I find it much less annoying to handle across the board
To the point that I actually enjoy using it 
The moon in an RC8 is tack sharp holy
The thing is sharp across the whole eyepiece
This is wild
We're fuqed
The am5n is doing it again
The design of the main board is garbage
They need to redesign it and send out better versions

If everything i just tried doesnt work, im going to try to get a full refund from HPS and return it to them
I dont gaf
Not anymore
time to show the eqm35 some love
I changed 4 variables and it seems to have fixed it
I don't know which of those changes would have fixed it.
But this is looking at one 10 minute sub that looks decent and an acceptable RMS
@harsh matrix you have a Touptek AFW right? And 1.25" filters?
My Touptek AFW is a 7x2"
Well do you have screw holes for unmounted filters?
I'm trying to figure out if there's a better way to solve the screw hole leaks than electrical tape
Yes
But my filters are mounted and the mounts are thick enough that they block off the holes
I actually didnt tape up the holes for unmounted filters on my ZWO EFW 1.25" and its fine
Yeah I was wondering how much those holes would actually matter in practice
i say that but i dont have broadband filters to use that would most likely show any effect they have on my images
My raw narrowband data at dark sites has a really dark background, especially in S-II, which is what I was more concerned about
that's normal
and while it doesnt seem like there would be light pollution from "home", it's still going to have a wild effect on your narrowband images
I dont know of a better way to cover those holes other than electrical tape, so if you want to put this to the test, you will have to think outside the box
Oh yeah the effect is definitely visible
And yeah I just find it frustrating that there isn't enough clearance on the opposite side of the filter wheel for me to just put the mounting screws in reverse
If there was enough clearance then solving that issue would be trivial
ik
i thought about trying that too but i dont see a way that it would work
@frosty shard Ive never heard of nodal astigmatism
@frosty shard whats up dan 😉
Okay, so here's an important property of RC collimation: when you null out coma you also null out astigmatism on-axis
So you have to check off-axis stars for astigmatism no matter what
thanks for the reminder I forgot to respond
oh i didnt mean to i just found your account on a rc group on facebook 😭
Yeah but I don't use my real name on Facebook
oh haha
Interesting
Thank u for this information
Did you contact ZWO?
And you swear on everything it couldn’t be a bad power supply?
I had a bad one on my gti and it screwed with my guiding
So I spent a crap ton and got amazing ones
Good point
@harsh matrix How many Volts your mount PSU outputs?
I had bought one without a ground “idk if related” so it was just 2 plug and it gave me spikes in current and dips
But it was also like 20 degrees outside so idk how it would do in heat I shipped them back fast
Should I risk it tonight? Or go out tomorrow 
I use a 13.5V 5A PSU for the mount
12.5
The PSU is good
From a purely optical perspective i think this turned out quite beautiful
Omegon
Master @harsh matrix Do you approve?
Almost?
There's a lot of color splotches that are coming from a lack of integration, so saturating that much makes those splotches pop out.
The SII and OIII is really dragging it down. 90min was all i could get on it
Yeah I wouldn't saturate it so much
The data can't support it.
i didn't touch the saturation😭
i saw that if i even nudgee the saturation curve even a bit, the data gets nuked
The hell
denoise 100
@tight lodge did you do this? 
Look at the bottom right
I mean it's evident in the whole pic but it's smooth as plastic
Ik yeah
Denise 0.65
You know that the only thing I cared about was to get the colors right and not bother with having realistic noise levels and all that stuff. So yeah, the SII and OIII had to be pushed really hard to get something that I can work with, but that's because I can't put dozens of hours in this project😂
Plus when I shot it I did it in an environment that most of you don't even bother seting up. 14° elevation and in astro twilight. So please... cut me some slack
I feel that. I mean I'm not trapped as far north as you, but I'm a rush to get good data on the Lagoon before it's gone
You do get astro dark right?
Yeah I still have a minimum of 4 hours during the solstice
But the Lagoon and other southern gems don't get very high
23 degrees for the Lagoon IIRC
I've lived a lot of my life in San Diego and Central Texas and the difference 15 degrees makes is dramatic
When I shot M16 I had 1h and 40 min of Astro twilight. Guess how much integration that photo has? 1h 30min. I squeezed everything I could out of it😂
Are there any calculators that are able to take into account the onset of astronomical dark for different bands
It's gotta come later for IR and red than bluer wavelengths
The lowest I can get here is 46° N. And in the summer, the night feels eternal compared to North Germany
You owe it to yourself to get to like 30 degrees north at some point
(or of course see the southern skies, but I haven't done that)
Hopefully next year though after I get my PhD
Yeah... I don't have to money to move somewhere better
Southern skies are beautiful tho
Have you seen southern skies?
Only in pictures
I have to remind myself for when I visit Australia not to try to do a 576 panel mosaic of the LMC with my RC
On the other hand, if I move to Australia...
lol
relatable
i mean sure but you can pull back on the denoise
its not artifacting here, its just too much of it
even a 50 hour integration with pristine data would have some fine grain noise
if you're concerned about chrominance noise you can go full ham denoise on the RGB and use a luminance consisting of mostly Ha
Is this better? 
Quite a bit
Yes
Save for a 571 you bone head
Thats what you wanted to do, so do it.
i mean yeahhhhhhhh but should i keep my 585? i feel bad selling it already
Id only sell it to close the gap for the 571 if you feel your income has slowed too much.
i feel i am just gonna lose so much on it
Id keep it because of the IR sensitivity
If you really think you need to sell it, im right here
I want one 
Fr? I will keep that in mind if your serious
It is a beast when it comes to ha for sure
I am
I don't have funds on hand at present ofc
yeah no biggy
@tight lodge
https://app.astrobin.com/i/362xwp
that is deep fried 😭
AND IT WON IMAGE OF THE DAY 😭
wait really?



