Stub Mandrel Posted July 21, 2021 Share Posted July 21, 2021 (edited) This time at a longer focal length of 135mm using a venerable Zeiss Sonnar. Edited July 21, 2021 by Stub Mandrel 2 Quote Link to comment Share on other sites More sharing options...
MarkAR Posted July 21, 2021 Share Posted July 21, 2021 Very nice image, always a brave move keeping the green 👍 Quote Link to comment Share on other sites More sharing options...
PeterBolt Posted July 21, 2021 Share Posted July 21, 2021 I like it! nice colours Quote Link to comment Share on other sites More sharing options...
Sonyme Posted July 21, 2021 Share Posted July 21, 2021 Super image. Nice to compare with Hallingskies image of the same nebula. Obviously different equipment but which processing software? Gary Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted July 21, 2021 Author Share Posted July 21, 2021 1 hour ago, Sonyme said: Super image. Nice to compare with Hallingskies image of the same nebula. Obviously different equipment but which processing software? Gary Photoshop and Astra Image. I use Astroflat Pro (which I find only works well if the image is already pretty well balanced). Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted July 21, 2021 Author Share Posted July 21, 2021 (edited) 1 hour ago, MarkAR said: Very nice image, always a brave move keeping the green 👍 It's a tough call. I want to keep a distinction between Ha (which comes out green) and HA+Sii which comes out yellow. I don't like the bright green so try and push it using selective colour so Ha is a duller yellow and Ha+Sii is brighter yellow. If I run HLVG weak I get this, which is perhaps better: If I run strong HLVG I get: This is a 'traditional' hubble palette, but always looks a bit dull to me. The problem with HLVG is that it kills yellows stone dead. I have extremely weak Reg/green colour blindness and this may mean that I see the line between lemon yellow and a very yellow green in a slightly different place. Edited July 21, 2021 by Stub Mandrel 1 Quote Link to comment Share on other sites More sharing options...
PeterBolt Posted July 21, 2021 Share Posted July 21, 2021 57 minutes ago, Stub Mandrel said: Photoshop and Astra Image. I use Astroflat Pro (which I find only works well if the image is already pretty well balanced). I also really like Astroflat Pro 👍 Have you tried this? https://picture-instruments.com/products/index.php?id=41&back=5 I found it another helpful plugin for PS Quote Link to comment Share on other sites More sharing options...
MarkAR Posted July 21, 2021 Share Posted July 21, 2021 Like the look of the weak HLVG even better, touch more yellow than lime green. 1 Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted July 22, 2021 Author Share Posted July 22, 2021 (edited) On 7/21/2021 at 3:16 PM, MarkAR said: Like the look of the weak HLVG even better, touch more yellow than lime green. Returning, I think I do too. I did a quick experiment on a photo of a yellow flower (a dandelion relative). Strong turned it a dull orange-brown, weak it stayed yellow, but more saturated. Obviously not what it is meant for but it's clear it 'kills' more acidic yellows if you use the stronger settings - I think it can spoil stars in RGB images too. Edited July 22, 2021 by Stub Mandrel Quote Link to comment Share on other sites More sharing options...
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