Results of 3 nights combined

[TiffsAndAstro]

Ok not sure why i have tadpoles, will maybe reduce the number of frames so more bad ones are rejected? But this is looking promising. TY again, again for your help with this.

[alacant]

14 minutes ago, TiffsAndAstro said:

i have tadpoles

Stack e.g. sigma clip low 5 high 2

HTH

[Elp]

17 minutes ago, TiffsAndAstro said:

tadpoles

Looks like a flats issue to me, or they're out of alignment with the lights.

If you're stacking pre calibrated master stacks you don't go through calibration again. You just skip to registration, then stacking. This is because your master stacks will have had their calibration files applied per each light session, from my experience flats do not work well if you reuse them, only perhaps in a observatory setup where the scope and train do not get disturbed. All it takes is a new spec of dust, moisture on the objective or worse slight camera rotation to make flats unusable.

Edited May 1 by Elp

[TiffsAndAstro]

5 minutes ago, alacant said:

Stack e.g. sigma clip low 5 high 2

HTH

Will give that a try.

I rejected like 80% until tadpole tail was mostly gone.

Feels like I'm almost there with the process, need better data.

[TiffsAndAstro]

5 minutes ago, Elp said:

Looks like a flats issue to me, or they're out of alignment with the lights.

If you're stacking pre calibrated master stacks you don't go through calibration again. You just skip to registration, then stacking. This is because your master stacks will have had their calibration files applied per each light session, from my experience flats do not work well if you reuse them, only perhaps in a observatory setup where the scope and train do not get disturbed. All it takes is a new spec of dust, moisture on the objective or worse slight camera rotation to make flats unusable.

I messed up a set of flats I think cos lint fell from white cloth I stretched over before taking ;(

[Elp]

If you're lucky you can simply clone stamp the defects out. Not so much if it's swamped with the things overlaying nebulosity.

[TiffsAndAstro]

15 minutes ago, Elp said:

Looks like a flats issue to me, or they're out of alignment with the lights.

If you're stacking pre calibrated master stacks you don't go through calibration again. You just skip to registration, then stacking. This is because your master stacks will have had their calibration files applied per each light session, from my experience flats do not work well if you reuse them, only perhaps in a observatory setup where the scope and train do not get disturbed. All it takes is a new spec of dust, moisture on the objective or worse slight camera rotation to make flats unusable.

I have flats for each session but in hindsight the ones for session 3 aren't great but better than not using them.

[TiffsAndAstro]

25 minutes ago, alacant said:

Stack e.g. sigma clip low 5 high 2

HTH

average stacking with rejection? What type of normalisation? 

[TiffsAndAstro]

53 minutes ago, alacant said:

Stack e.g. sigma clip low 5 high 2

HTH

Holy smoly that did it, ty so much. will try rejecting a few more frames see if it improves any. the lack of green is purely due to my mastery of pressing photometric colour calibration. Tadpoles definately fixed by this though.

not sure if i'm using the best stacking option/s otherwise, but its a really good start - ty so much. 

gonna re register using 2xdrizzle now i know it works and do my post processing

Edited May 1 by TiffsAndAstro

[alacant]

1 hour ago, TiffsAndAstro said:

normalisation

Additive.

[alacant]

52 minutes ago, TiffsAndAstro said:

gonna re register using 2xdrizzle

LOL... You should change your id to

TiffsAndAstroGFP😉

[TiffsAndAstro]

9 minutes ago, alacant said:

LOL... You should change your id to

TiffsAndAstroGFP😉

I dunno what gfp means

 

I Even googled it

[TiffsAndAstro]

15 minutes ago, alacant said:

Additive.

I'll give that a go next. At least re stacking now is much faster

[alacant]

https://www.acronymfinder.com/GFP.html

 

[TiffsAndAstro]

6 minutes ago, alacant said:

https://www.acronymfinder.com/GFP.html

 

At least that explains why a Google search of "gfp meme" wasn't helpful

To be fair I've never had that full green screen as a result before, either stacking two sessions in dss or any other single sessions in siril. Thankfully I have the magic of PCC

[TiffsAndAstro]

thanks all for your help. my post processing is a tad random. i like the golden colour on my previous image at the top of this thread, but also like the result created with all of your help   More silvery dunno if that's more 'correct' or not

[Swillis]

11 hours ago, alacant said:

TiffsAndAstroGFP😉

Didn't expect GFP to pop up on here

 

16 hours ago, TiffsAndAstro said:

Definitely check out deep sky astro video on sirilic.

Thanks for the recommendation I gave this a watch and it looks fairly straightforward now.  Will give it a try the next time I have multiple sessions to stack. The only thing I was unsure of was of you can use a constant bias value rather feeding it a set of bias frames. I'll have to look at the docs

[TiffsAndAstro]

2 hours ago, Swillis said:

Didn't expect GFP to pop up on here

 

Thanks for the recommendation I gave this a watch and it looks fairly straightforward now.  Will give it a try the next time I have multiple sessions to stack. The only thing I was unsure of was of you can use a constant bias value rather feeding it a set of bias frames. I'll have to look at the docs

Not sure if that's possible. Still beyond my understanding \ abilities 

[alacant]

2 hours ago, Swillis said:

The only thing I was unsure of was of you can use a constant bias value rather feeding it a set of bias frames.

Or of course whatever offset your camera is set to. This is for the OP's 600d.
I recommend learning Siril manually to begin with. Perhaps better go with Sirilic when you have that mastered. Otherwise it can become a time consuming guessing game!

HTH

Edited May 2 by alacant

[Swillis]

@alacant I'm already using Siril manually and use 2048 as bias (also 600D). It wasn't clear from the suggested video if you could do that in Sirilic.

[alacant]

Sorry. My bad. I thought I was replying to the op.

Edited May 2 by alacant

[alacant]

22 hours ago, TiffsAndAstro said:

doesn't seem to be any option to remove the failed frames within plot.

Right click on the frame -> exclude

22 hours ago, TiffsAndAstro said:

Global Star Alignment

Correct. 

[Swillis]

I have just tested Sirilic and you can use a constant bias value. Just click edit and type in =2048.

@TiffsAndAstro thanks for the recommendation, I'll probably stick with manual in Siril for most cases just so I know more about what is going on, but I can see this being useful with more than a couple of sessions to stack.

[TiffsAndAstro]

Just now, Swillis said:

I have just tested Sirilic and you can use a constant bias value. Just click edit and type in =2048.

@TiffsAndAstro thanks for the recommendation, I'll probably stick with manual in Siril for most cases just so I know more about what is going on, but I can see this being useful with more than a couple of sessions to stack.

I think I'm in similar boat. I'm going to do more manual stuff in siril especially single nights, while I try and learn it But sirilic looks potentially great for multiple night stuff.