Help with gradient

[cinder mural]

Can someone help me with background extraction?
It seems like siril is obliterating my snr.
I tried to make good samples and I used rbf method
Both pics are histogram stretch, also here is the raw stack
https://drive.google.com/file/d/15Ob-tcDI2lMDfZvPxBDs7Jcsxq6kbGy-/view?usp=share_link

[flint storm]

Sure

[sharp quarry]

@cinder mural After a load of backround extraction/desaturating and stretching over and over i present to you... This! i think a noise reduction couldve been useful but i didnt run it through pix

Only thing that i couldnt save is the blue stars Xd

[cinder mural]

Very nice, thank you!
Light pollution is unforgiving...
I think my flats are not very good as well, I noticed a dark ring in blue channel.
I managed to edit the data somehow but I used topaz quite a bit to compensate.

[sharp quarry]

Yeah i saw it but mostly cropped it out and flats are quite important (not that i did them properly for awhile XD) but i noticed a stacking artifact? or some weird banding anyway but i got rid of it right center of the screen and yeah i may reprocess this again see if i can save the blue stars

Very nice data apart from light pollution ruining it as it does XD

[cinder mural]

Thanks, the weird banding is some odd issue from my dslr.
Its fullspectrum, and sometimes it starts "acting up" with tons of noise or banding.
No idea what exactly is happening

[open moat]

Try bias

[cinder mural]

I did, both bias and darks.
The problem is the banding is not constant it happens ocassionatly

[sharp quarry]

Banding isnt a problem in siril theres banding reduction in image processing and it pretty much just gets rid of it all immedietly

[cinder mural]

Oh my I forgot bout that feature, thanks for reminding me

[sharp quarry]

Haha np first time ive actually used it in my year of experience with siril and it worked amazingly

[sharp quarry]

also id recommend for the gradients maybe try a lower ISO setting say your shooting 1600 try 800 i heard it helps a bit

[cinder mural]

That would be interesting experiment, I think the best solution would be getting dual narrowband filter some time in the future.

[sharp quarry]

I think horse would just be better with just Ha? although dula narrowband is helpful for things like veil neb

[cinder mural]

You are right, I was thinking more in general sense of shooting nebulae.
Ya know would rather get that OIII as well because im shooting with dslr

[sharp quarry]

yeah i use a DSLR to but mines not modded and i did a test on horsehead and could see it rather well after 15m of data which was really surprising to me but yeah i think a dual narrowband would get more use out of it

[cinder mural]

damn I didnt know they help so much, I had the impression that stock dslr + ha lifter would be a misery fest

[sharp quarry]

didnt even use a Ha filter it was just raw XD so i think for unmodded a Ha filter would be a misery

unless you can pull like 8m subs

[cinder mural]

aa my bad i see what u meant, I barely focus the thing without filters... xd

[sharp quarry]

Xd dw i can feel your pain as i shot it with a astromaster 80mm... F/11

[cinder mural]

oof, i felt like F/7 was slow lmao.
how long were your subs?

[sharp quarry]

40s it was before i got my HEQ so i was using a nexstar mount that i had

[cinder mural]

what is love

[sharp quarry]

?? Song lyrics? Sorry i forgot them if it is XD

[cinder mural]

ye, im just memeing around lol

[sharp quarry]

also you think F/7 slow... Ive never shot under F/10

[sharp quarry]

Baby dont hurt me

[cinder mural]

can u post some examples, Is it a long fl scope?

[sharp quarry]

Sure and yeah 900mm with 3.15" aperture XD

ill send the horsehead and some of my better shots with it

Here’s some of the best I got out of it

[sharp quarry]

Sorry took awhile it just wasn’t working for a minute

[cinder mural]

dont stress it c:
the bodes and cigar look so good

props to ya

[sharp quarry]

Thanks i put probably an hour of exposure time to it (: 40s subs again as i couldnt really go longer at the time

[cinder mural]

yeah, I should try to shoot these two very soon, I didnt know they were so bright

[sharp quarry]

i can see them with an eyepiece in bortle nine with 8" aperture (F/10 still though)

very easily noticable with like 20s subs

[cinder mural]

thats nice, new cool target + its bright

I tried to find them before with 6 inch dob but failed big time lol

[sharp quarry]

Lol i found them thanks to GoTo systems existing XD

[cinder mural]

hahah I didnt have a mount at the time, I was just looking at stelarium and trying to match the stars as they were inverted in finder scope

jesus what a night that was

[sharp quarry]

whoops wrong button XD

[sharp quarry]

I feel that at one point my goto system wasnt working properly so i did this aswell

[cinder mural]

ahem... clicks invert ra axis

opsies

[sharp quarry]

It was a alt az mount that SUCKED and couldnt shoot even andromeda with 10s SUBS

What mount do u use?

[cinder mural]

I use heq5, no guiding yet

[sharp quarry]

same lol

[cinder mural]

I attached webcam sensor to a finder scope, but Its too noisy for guiding

rip that camera

[sharp quarry]

Rip also i noticed you shot with a 130 PDS hows andromeda inframe? Gonna be my next scope so wanna get best examples

[cinder mural]

Im gonna find that out soon, I shoot with aps c sensor so its a bit tight.
ill send the framing that telescopious is giving me, its pretty accurate

[sharp quarry]

I believe im the same sensor size so i hope its good

[cinder mural]

there ya go

[sharp quarry]

Oh nice and yeah same sensor size XD what camera u got?

[cinder mural]

nikon d3500

[sharp quarry]

BRUHHH

[cinder mural]

no way

hahaha

[sharp quarry]

legit

got it XD

[cinder mural]

nice, what do you use for remote controll for the cam

[sharp quarry]

I use DigiCamControl on a laptop via wire

[cinder mural]

my man

I wish I could use nina, mby if we ask the devs they could implement whatever the digicam devs did

[sharp quarry]

Im not using NINA anytime soon because i dont have guiding yet

and no clue how to use it XD

[cinder mural]

neither but, I like the idea of using its platesolve, so I dont have to correct the mount manually

when doing first slew

[sharp quarry]

ahh yeah but again i dont know how to plate solve even XD

[next bluff]

@cinder mural Do you have pixinsight?

[cinder mural]

No unfortunately

[next bluff]

Oh, I see

[sharp quarry]

Not got the trial?

[cinder mural]

Im saving the trial for when i feel like im ready for it lmao

[next bluff]

Fair enough

[sharp quarry]

Fair better idea than what i did i just got it and didnt know what i was doing XD

[cinder mural]

Is pix dbe better than sirils background extraction

[sharp quarry]

but ive learnt it now its incredible

[next bluff]

It does give you more control on how it acts, and corrects it

[cinder mural]

Thanks, thats exactly what I want out of it

[sharp quarry]

damn thats crazy though same setup near enough XD

[cinder mural]

yeah xD

Btw i modded the cam myself.
It does have some odd issues after I did the mod

those bands and when its not screwed in properly in becomes noisy as hell, ill show u an example

[sharp quarry]

k

[cinder mural]

https://drive.google.com/drive/folders/1ySkdsEC-auO5IJ1srsX5ILpLoq8QOm-o?usp=share_link
you can see comparison in 2 dark frames of 30s and banding in other pic.
As far as i understand what is happening is that sensor needs replacement glass instead of full spectrum mod, otherwise sometimes you get this carzy noise

[sharp quarry]

Ahh yeah that looks bad ngl ive considered modding it but i think i could get more data overall with longer subs than normal

unless your right with the glass over the sensor thing

[cinder mural]

If you are gonna do it just dont go bare sensor and you will be ok, there was no resources online for this model.
Any how it works normally 80% of the time and other 20 it goes bonkers with the noise

[sharp quarry]

Yeah the only problem is that if i did screw it up in anyway i really couldnt get a new camera anytime soon cos at that point id just save for a 1600mm

[cinder mural]

I think thats far wiser decision then what i did xD

[sharp quarry]

XD i still consider modding it once in a while but ive seen i can get HA with 40s subs so i know im good if i dont

but i think before the 1600 which is ages away id get the 130 pds

[cinder mural]

Yea I think so as well,
For me the scope is awesome.
Cant even imagine what it would feel like for you to go from f10 to f5, for me going from f7 to 5 was insanely fast

[sharp quarry]

I cant wait i think when i do eventually do it ill get a Coma correct 0.9x so itll be probably like F 4.6 or something

[cinder mural]

I am thinking the same, I dont have the corrector yet but more speed and flat field wow that will be so good

I god the scope like week ago

[sharp quarry]

damn itll also be a good change in targets cos im always at 900mm or 2032mm which is great for dream galaxys but i really cant shoot nebulae and i really wanna shoot rossete

Anyway i gotta go rn but was nice talking and if you need anything just @ me (:

[cinder mural]

Cool man cya around!

[cinder mural]

I found out today what was causing this crazy gradient.
It was caused by my lazyness, I wasn't using any diffuser between my scope and laptop screen when taking flats.
Here's a link if you wanna know more about it, someone had the similar issue as me https://stargazerslounge.com/topic/311438-weird-gradients-appear-after-stacking-from-use-of-flats/

Btw found out this by rotating camera mid session and deciding not to use flats, It was just a night for testing anyway.
And then it hit me when I saw no weird gradients in the stack, except the vignette.
I restacked this data without the flats and ofc It's just the vignette.
(the pics are unlinked histogram stretch in siril)

Im so happy that I can do something about it, and also a bit angy at myself for being a dum dum and not doing flats properly.

[sharp quarry]

Oh damn! @cinder mural i forgot your user awhile ago But i needed to ask if you followed any tutorials or guides for modding the D3500

[cinder mural]

I didn't follow any guides because i couldnt find any that were for D3500. I might still have a video of me doing the mod, ill go dig for it.
I imagine that would be very useful to u?

[sharp quarry]

Super useful thanks! I dont have the confidence to do it without one so would be greatly appreciated (:

[cinder mural]

Aight I'll pm u when I get upload the vid

[cinder mural]

https://www.youtube.com/watch?v=ovRh5zsCBIk @sharp quarry

[sharp quarry]

Thank you sm! Last thing though do you have to dither? Cos I haven’t got a clue how to

[cinder mural]

You are welcome, You kinda have to do guiding if you wanna dither.
Im struggling myself with it cuz my guiding is diy grabage lol

You can get away with it but ofc if you can dither you def should do it

[sharp quarry]

I’ll be guiding soon but rn I don’t have a banding issue (walking noise?) but I’m worried that could change after the mod so I wanted to see if you have it

Or had to dither

[cinder mural]

that banding I mentioned before is different from walking noise, the banding from the mod is not gonna bother you most of the time

but walking noise is allways there regardless from mod

[sharp quarry]

Ok sorry I forgot what walking noise was but that’s cool I was just worried about banding but thank you a lot I’ll tell u how it goes (:

[cinder mural]

great, you will see some info about that noise in the vid. if you need anything you can allways ping me

[sharp quarry]

Thank you sm! I shall if I need to (:

[sharp quarry]

@cinder mural how did you reach these screws?

[cinder mural]

If im not mistaken those don't need to be unscrewed. Try removing other available screws around the front (screen) area and under the rubber grips.

I remember running into the same prob, if this doesn't work out hmu, i will give it a go myself.

[sharp quarry]

So far I’ve noticed that everywhere is coming off but here? Any hidden screws I may have missed?

[sharp quarry]

I have taken the rubber grip off the SD card area and got that screw but i cant think where else ive missed

[cinder mural]

Try the screw at the bottom of the slot for battery.

[sharp quarry]

In the inside?

[cinder mural]

Yes. Shine some light, you will see it

[sharp quarry]

Ahh ok yeah i think thats the last one thanks!

[cinder mural]

Np.!

[cinder mural]

Also under this rubber. Where the notches are.

2 screws

[sharp quarry]

Ok cool thanks! Just getting it off now

[cinder mural]

Great, honestly it's amazing how many screws they manage to hide. 💀

[sharp quarry]

Yeah and how much glue they can put under these rubber pads 😅

Ok I’m in but how do I unclip these 😅

@cinder mural Sry to keep @ing you 😅

[cinder mural]

It's okay, i was shaking when i was dissasemblimg mine lol. I think the ones that are bottom right from discord perspective, the orange and brown, the black plastic needs to go up, like a latch

After that black part is up you can pull the cables out from the slot

[sharp quarry]

Ok what about his main white one?

[cinder mural]

If theres no latch like in the previous ones, then you can just pull it out.

Those are just a nightmare to reconnect.

[sharp quarry]

Lol im scared its gonna rip though 😅

K did it

I believe i can watch your tut from here so thank you very much! If i run into any more trouble ill @ you

[cinder mural]

Awesome, good luck! I'll be round my phone in case you ping me

[sharp quarry]

@cinder mural did u use 3 types of screw drivers? On the screws u said is important to remember?

One of them isnt screwing like the other 2 did

This one I’m so close to finally being done now I’m shaking 😅😂😂

[cinder mural]

It's just important to remember how many turns it took to remove the "3" screws.
They might be different, the footage is a bit old so i couldn't remember if they are the same type. Moral of the story just try to remember their turns so you can reassemble it the same way at the end

I hope this makes sense

[sharp quarry]

Ok ill grab a new one and yeah it made perfect sense! So far the other 2 have been 8 so hopefully this one wont be different lol

[cinder mural]

Alright, I'll be here so don't worry, you got this!

[sharp quarry]

Thanks! trying to get it done its clear and getting dark so i wanna be able to test it today hopefully

[cinder mural]

im wait for my clouds to leave, they should be gone in an hour or so, hopefully both of manage to do some imaging

[sharp quarry]

Niccceee what u imaging today?

[cinder mural]

Probably heart nebula

[sharp quarry]

Thatll look great! Cassiopeia is gone for me for awhile now

[cinder mural]

I'm trying not to image near moon it's gonna be interesting

[sharp quarry]

smart lol im sorta doing the opposite 😅

Gotta get some of my last shots in the orion constellation before thats gone too

Please tell me this was the filter not the sensor cos it’s cracked

@cinder mural

[cinder mural]

yes

thats the filter

[sharp quarry]

Phew 😅 just reassembling everything now

[cinder mural]

Aighty gl with those cables they are annoying as hell

[sharp quarry]

lol I’m lost here already 😅

[cinder mural]

first the bigger part goes back on the sensors board, it has some odd mechanism like a hinge, try not to use force, it should go back eventually

if you really get stuck, ill teardonw mine apart and see how I did it.

[sharp quarry]

Its got a sticky pad on it but idk what way round it goes

[cinder mural]

these corners need to be connected

[sharp quarry]

Ok and the smaller bit?

i got the plate thing on

[cinder mural]

heres from the video, plus the cable that goes on, the small plate ill go look

gimme a sec

the small plate is for when u get the sensor on, so not that crucial yet

[sharp quarry]

Ok im trying to get the ribbon on cos i forgot about it but i cant seem to put it back on

[cinder mural]

you need to push donw on it, its not like the ones from before at the beginnin

kinda like button if you know what i mean

[sharp quarry]

How hard 😅 i dont wanna break it

[cinder mural]

uhh shouldnt be that hard, chek the orientation, i dont think its the same

[sharp quarry]

Ok i think its on

[cinder mural]

grea

t

[sharp quarry]

Ok i think its time to put the sensor back on the body

[cinder mural]

Dont forget to count the turns on the screws!

[sharp quarry]

What do I do about the springs?

[cinder mural]

Try not to play wit them, we are trying not to insert any variance if possible

i was an idiot first time and just took em out lol

[sharp quarry]

Ok but it seems to stop me putting it on

[cinder mural]

yes, they are meant to resist, try to conncet the threads of the screw 1 by 1 and then proceed to do the rest.
Should be doable

[sharp quarry]

Ok so i may have lost count on 1 😅 does leveling the sensor work?

like making it as flat as possible

[cinder mural]

Yeah probably, i didn't do any counting on mine, so i just needed to readjust later on, and it worked out.

[sharp quarry]

Yeah im trying to do it right cos i dont wanna have to do this again 😅 too scary

[cinder mural]

Haha i totally understand, it's super stressful. But after this it won't be

[sharp quarry]

Ok where does this go? Or do I need to put the circuit board on first

K imma eat my dinner then continue

[cinder mural]

Refer to the screenshot i sent a bit before, order shouldn't matter if i remember correctly.
Just do the small plate now and then do the rest.

There is a hole on the circuit board which thru you can acces one of the screws somewhere near or on that small plate. So in any case I don't think you'll need to undo stuff later on.

[thin adder]

i doit for you

[sharp quarry]

@cinder mural So its all plugged in but it wont turn on? Ive not screwed the back screen on yet cos i wanted to test it but it wont turn on?

[cinder mural]

Hm I havent Is the screen pluged in, (the first ribbon cable you asked me how to uplug

[sharp quarry]

yep

all wired and ribbons appear to be connected

[cinder mural]

try reconnecting it, It happend to me as well,

[sharp quarry]

un plug the ribbon and plug it back in?

[cinder mural]

This doesent look right

try to make it parallel with the white port

It seems crooked if you know what i mean

[sharp quarry]

ahh ok ill get my mum to do it as she has taken part phones alot 😅

2 secs

[cinder mural]

alright, I remember almost crying cuz i couldnt plug it in with my thicc fingers

lol

[sharp quarry]

lol fair np brb

[thin adder]

i hope you like it

[cinder mural]

Nice one!

[thin adder]

thank you

[sharp quarry]

@cinder mural Thank you soooooooo muuuucchhhhh today man!!!!!!!! Its done just gotta put the back bit on properly then its complete i cant thank you enough!

[cinder mural]

Its workin?

[sharp quarry]

Yep my mum thought maybe it has some kind of way of telling itself if the back is on or not and surprise surprise when we put the back bit on correctly without screws it worked

[cinder mural]

Hell ye, glad its working

[sharp quarry]

Thanks sooo much man! U got me to do something ive been super hesitant on for 6 months now

[cinder mural]

You are welcome, I know exactly what you mean, well done men

[sharp quarry]

[sharp quarry]

@cinder mural is it usual for stars like Rigel to look really orange now? I’m trying to star align and I can’t tell if it’s the right star or not cos of it lol

[cinder mural]

Yes, now your sensor can see more of the red spectrum meaning that broadband targets like stars are gonna be brighter. Also if you are shooting thru any glass your stars may bloat depending how well corrected your optics are for ir spectrum

Btw you may want to make custom white balance for your dslr, if you leave it at default everything gonna be red

[sharp quarry]

Ok as I’m shooting through a SCT like 99% of the time I’m used to normal orange blue and white stars so it was very strange looking at capella being orange 😅 how would I create a white balance setting?

[cinder mural]

You basically need like a white paper under daylight i think and then shoot a pictures so you can tell your camera what shoud look white and it will calibrate itself. Look around online you will find some guides, it doesn't take longer than 5 min

[sharp quarry]

Ok and last thing I’ve noticed is this thing hang on

I don’t know how well you can see but there’s a odd patch in my images

I don’t have sensor tilt btw that’s just cos guiding was calibrating

[cinder mural]

Are you refering to the bright corner or this thingy above the corner?

[sharp quarry]

The odd pattern above the corner like black zigzags sorta

[cinder mural]

Oh i se what you meant. Never saw anything similar. Can't really make out much from a pic like this

[sharp quarry]

Ahh yeah it’s there in every image rn but I’m hoping it’s just a bit or dew or something but too consistent I feel

[cinder mural]

I hope it's nothing too serious, or that it will calibrate out w flats.

What are you imaging?

[sharp quarry]

That’s what I’m hoping too lol and I was shooting the flame neb to test the sensitivity and yeah it’s defo more sensitive but that’s gone so I’m reshooting M81 rn

[cinder mural]

Great, I got the opportunity today to shoot the heart.

Not looking too promising, it's sooo faint

[sharp quarry]

Damn well if u want to share the stack after your done I can try processing aswell (dw I have gotten so much better since i processed your horse)

[cinder mural]

Sure thing, it's gonna be fun. I got like 2h40min for now. We'll see how long till i hit the trees

[sharp quarry]

Haha I know that feeling 😅 that’s what happened to me with flame neb like 15m ago

[cinder mural]

Btw what mount do you use? I forgetti

[sharp quarry]

I now use a HEQ 5 with a OAG

[cinder mural]

Do you use plate solving to point the scope?

I managed to get nina to do it, it points to the framing i give it and no more star alignment

[sharp quarry]

I’ve tried NINA and APT but both seem to hate the D3500 I tried soo long so I’m just gonna stick with good ole SynScan app on my laptop until I eventually give in to a 1600MM

[cinder mural]

I see, if you decide to give it a go, i figured how to make the 3500 and nina to cooperate for the plate solving

You can ask ofc

[sharp quarry]

Cool sometimes star alignment works literally perfect like today it went straight from alnitak to M81 centered Inview but sometimes it’s a little off so definitely considerable lol

Target is always inview from first slew though which is way better than 2 months ago with my Alt Az mount😅

[cinder mural]

Yeah makes sense, i transitioned to this because i wanted a specific framing of the target and i can barely see the neb so it got annoying to do it manually

[sharp quarry]

What focal length and ratio do u shoot at? I’ve never shot under F10 so I’m curious what that’s like tbh

[cinder mural]

650mm f5. The difference from f7. 3 to f5 is 2x light gathering power. And I can confirm i felt that 2x i get nice signal/noise

So basically I love it

[sharp quarry]

I plan to either get a 130PDS or get a 80mm evostar so both around F6 to F5

[cinder mural]

Yeah i was kinda having the same debate, but opted for the 130pds because it's very budget friendly

[sharp quarry]

Yeah the only reason I’ve considered the evostar is cos it looks actually high quality and isn’t too much more than the PDS

[cinder mural]

It's so hard to decide, but I believe either option would do a great job for ap

[sharp quarry]

I only considered the PDS cos the focal length was perfect and for a long while couldn’t find a refractor in budget with about 500mm focal length until I found the evostar

[cinder mural]

Agreed, love how everything frames up at this mm.

Btw gonna go take flats

[sharp quarry]

Np gonna do some moon close ups soon so yeah lol

[sharp quarry]

@cinder mural this is with flats… I’m really hoping it’s cos the focus may have been wrong here but I’m a little concerned now

[sharp quarry]

Nvm false alarm I didn’t clean my sensor well enough before shooting and my flats aren’t focused the same so it didn’t correct it properly

[cinder mural]

Hopefully cleaning works out, got scared for a sec because it's such a cohesive pattern.
Other than this, any issues?

[sharp quarry]

Uhh yeah it’s too Ha sensitive 🤓

Nah only joking it’s great thank you so much man! I really really appreciate it

It’s actually less noisy than it was before aswell which was surprising

[cinder mural]

Great, hopefully it serves you well. Glad to help!
Btw I will upload the 3h heart stack sometime today. It need lots more data, but it's okay. Will tag you