another widefield Cygnus

[Horwig]

I've been trying to get my head around using PI with RAW images from my Canon 5d3, but the results have been very patchy, noisy and lacking any smooth detail in the dust.  So  here I've tried a different workflow as an experiment.

Firstly, convert the RAWs to 16 bit non linear Tiffs in Lightroom applying lens correction, then registration and integration in PI, then into Photoshop for final tweeking. No control frames were involved!

It's still way off perfect, but far better than any version I've got out of PI on its own.

 

Huw

[Victor Boesen]

Very impressive image! Looks like it is made in 3D!

[M Astronomy]

Wow! Awesome image! I just started with astrophotography and have been trying to get some of Cygnus. Absolutely no where near as good as yours but I guess I'll keep trying. 

[A40farinagolf]

Brilliant image, please will you share details re scope / lens, camera, number of images, mount, guided or not, etc as I'd love to be able to replicate it.

 

 

[Horwig]

Thanks all, yes I forgot to include the tech details for the image.

It was shot with Canon 5d3 mounted on a Star Adventurer

Canon 24-105mm L lens, at 48mm and f4

14 subs of 120 seconds at ISO 3200

 

Huw

[Davey-T]

Nice pic Huw, I see you have the same problem as me with the Canon 24-105, you get funny shaped bright stars as top right in your image.

You can make a custom brush in P'Shop and go round and correct them.

Dave

[Horwig]

Got back to work on this image tonight, did a re-process with full control frames, but using the convoluted workflow I used above, it's better, but still no cigar.

On 25/09/2017 at 21:52, Davey-T said:

Nice pic Huw, I see you have the same problem as me with the Canon 24-105, you get funny shaped bright stars as top right in your image.

You can make a custom brush in P'Shop and go round and correct them.

Dave

Dave, looks like the strange stars are caused by coma in the blue channel, here's a stretched single sub:

The problem can be hidden using 'replace colour' in Photoshop to drop saturation and brightness of the blue fringes.

I have processed another version of the image which is less noisy, but in doing so I have lost the smooth texture to the dust, somewhere between the two must be a sweet spot, I'll come back to this one more time

 

Huw

[Davey-T]

21 minutes ago, Horwig said:

Got back to work on this image tonight, did a re-process with full control frames, but using the convoluted workflow I used above, it's better, but still no cigar.

Dave, looks like the strange stars are caused by coma in the blue channel, here's a stretched single sub:

The problem can be hidden using 'replace colour' in Photoshop to drop saturation and brightness of the blue fringes.

I have processed another version of the image which is less noisy, but in doing so I have lost the smooth texture to the dust, somewhere between the two must be a sweet spot, I'll come back to this one more time

 

Huw

I find it easier to go round and stamp them round following this tutorial

Dave

https://www.youtube.com/watch?v=YuEX3KLrAUo

 

[Horwig]

Thanks Dave, will have a look

Huw