Quote:
Originally Posted by Amaranthus
Dithering will deal effectively with hot pixels, but not dark current (and the noise associated with this unwanted signal). As noted above, if you have a low-noise sensor coupled with deep cooling, then dark subtraction is probably not worth it. But for uncooled DSLRs, for instance, it's a vital calibration.
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here are my recent efforts without darks.
https://www.flickr.com/photos/803366...ream/lightbox/
https://www.flickr.com/photos/803366...ream/lightbox/
while definitely not noise free, I wouldn't claim that missing out on doing darks was a vital error.
I would perhaps have a different view if I were in warmer weather or had evident sensor banding, used a higher ISO or had an object with less signal, or as I mentioned earlier had a lot less integration time or total sub numbers.