Dmack1 Posted November 25, 2020 Share Posted November 25, 2020 So this is the final image of M45 with some (about 20 x 120s) shorter subs added and processed as HDR.The difference is quite subtle although there is a little more structure and contrast in the brighter nebulae. But thats at the cost of some of the fainter outer clouds. If I'm honest I think it probably was not really worth the effort.But I'd appreciate C&CNew image with HDRhttps://cdn.astrobin.com/thumbs/2HDNq7dKX-GR_1824x0_SH1tglsS.jpgPrevious rev (nearly 4 hours 180s)https://cdn.astrobin.com/thumbs/R0LnqUEpfttj_1824x0_O3Qyqi6r.jpg 9 Quote Link to comment Share on other sites More sharing options...
don4l Posted November 25, 2020 Share Posted November 25, 2020 Very difficult for me to choose.I *think* that I prefer the top one, but they are both much better than I have done (yet!). 1 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted November 25, 2020 Share Posted November 25, 2020 Both look great, the top one has a weird artifact on the left hand side, did you use flat frames when calibrating your images? 1 Quote Link to comment Share on other sites More sharing options...
Astrobdlbug Posted November 25, 2020 Share Posted November 25, 2020 I am a sucker for all the dusty stuff, so I prefer your original and also the blue is IMHO a better shade in the original as well- so the bottom image for meBTW - you also captured a extremely distant galaxy UGC2838 at 280 Million Light years distant - its probably one of the most imaged galaxies due to it being in the frame for any M45 image. It is upper center just above the Pleiades in your image orientation, I've highlighted it in this snapshot from your image 1 Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted November 25, 2020 Author Share Posted November 25, 2020 Posted by: @AstronomyUkraine Both look great, the top one has a weird artifact on the left hand side, did you use flat frames when calibrating your images?Yes, its a dust bunnie - I was having problems with dust dust moving about during the flats so the flats were not consistent so even after applying them there were some issues. I removed a few using healing brush but that one was not showing on my screen when I was processing although it is very evident on this screen. Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted November 26, 2020 Author Share Posted November 26, 2020 Posted by: @Astrobdlbug I am a sucker for all the dusty stuff, so I prefer your original and also the blue is IMHO a better shade in the original as well- so the bottom image for meBTW - you also captured a extremely distant galaxy UGC2838 at 280 Million Light years distant - its probably one of the most imaged galaxies due to it being in the frame for any M45 image. It is upper center just above the Pleiades in your image orientation, I've highlighted it in this snapshot from your imageI'm with you on both the dust and the colour but I do like to see the structure in the clouds too! But you cant have everything.WOW! I did not know about that Galaxy, thanks for pointing it out -of course now I know its there I will see it every time. 280 Million light years! With my old Canon EOS! How cool is that? Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted November 26, 2020 Share Posted November 26, 2020 @Dmack1 Nobody will ever know when you crop it. ? Quote Link to comment Share on other sites More sharing options...
Gina Posted November 26, 2020 Share Posted November 26, 2020 Both look superb to me too. ? Too difficult to choose. Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted November 26, 2020 Author Share Posted November 26, 2020 Posted by: @AstronomyUkraine @Dmack1 Nobody will ever know when you crop it. ?No I'll go at it with the healing brush tomorrow. It will just bug me constantly now ? Quote Link to comment Share on other sites More sharing options...
Astrobdlbug Posted November 26, 2020 Share Posted November 26, 2020 Posted by: @Dmack1 I'm with you on both the dust and the colour but I do like to see the structure in the clouds too! But you cant have everything.Weeellll - with digital processing you can have most of your cake and eat it - dont know what tools you are using for processing but in Photoshop there is a 'filter' under Sharpen, called 'unsharp mask' - weird name but it has its roots in the days of darkroom tricks of the trade to 'sharpen an image under the enlarger by mixing a negative with a slightly blurred negative (kind of non intuitive I know) and highlight edges, namely 'structure' so I just took your posted jpg and applied a reasonably large sharpen, just to put an emphasis on the way it can work, I used a 10 pixel 'blur' and applied 60pct of the function, normally something between 2-5 does the trick. I also brought your dark point down to around 23-25 which also helps make the nebulousness of M45 'pop'If you have PS give it a go, personally HDR is more about 'flattening luminance' and not really about highlighting edges, which in our world is gas cloud structures,Bryan 1 Quote Link to comment Share on other sites More sharing options...
Bob-c Posted November 26, 2020 Share Posted November 26, 2020 Nice images, ? Bob. Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted November 26, 2020 Share Posted November 26, 2020 Both are great images. Quote Link to comment Share on other sites More sharing options...
MarkAR Posted December 11, 2020 Share Posted December 11, 2020 Both very good but I think I prefer the previous image with more cloud. 1 Quote Link to comment Share on other sites More sharing options...
P Holdsworth Posted December 11, 2020 Share Posted December 11, 2020 Both are great images though the top one just edges it for me ? Quote Link to comment Share on other sites More sharing options...
Jkulin Posted December 23, 2020 Share Posted December 23, 2020 Very nice image David, I think you lost a bit of star colour in the revision, but both really lovely. Quote Link to comment Share on other sites More sharing options...
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