Quote:
Originally Posted by gb44
Nice one Martin.
Its a new take on the neb for me - I'd not seen the part to the rhs before and I thought the "Swan" name came from the shape of the brighter region (of the body?), but now I can see the neck and head clearly. Or am I confused?
Thanks also for the StarTools note on reusing Autodev after Wipe in another post. I had been using FilmDev but now see the increased area of signal/nebulosity that I was missing.
Cheers
GlennB
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Thanks Glenn
I’m sure the name Swan came from either a visual observation or short exposure where only the bright core areas were seen. It does look like a Swan , well sort of ?
Now Startools …..
I’ve hardly ever used FilmDev as it’s just a uniform stretch across the whole image and it always blows out detail in nebula or core areas of galaxies etc…
AutoDev has superior algorithms to expose detail and brightness where it is required. You have more control over the stretch and attributing dynamic range where it’s most useful across the image. I always apply and adjust a ROI ( region of interest) around the main structure and tweak “ignore fine detail” , “shadow linearity” and “Outside ROI”
First AutoDev stretch is to inspect image for stacking artefacts and other anomalies, then
Bin if you oversampled
Crop to crop out stacking artefacts etc…
Wipe to remove all types of gradients
2nd AutoDev for final stretch to expose detail from your hard work
Then Contrast , HDR , Sharpen and so on ……. Until colour and then final noise reduction.
Cheers
Martin