Quite right, and I often do that. Its just that one of the big benefits of binnng, as originally raised, was to reduce file sizes and processing time, and these benefits are not realised with downsampling. Its a different beast.
Im not complaining though, just more hard drives!
Yes - with cmos or very low noise ccd's there is little motivation to bin during acquisition in terms of noise or improved quality in the end result - but there are many reasons to stay unbinned. For cmos there is no benefit in binning during acquisition in terms of read noise - and as Tim pointed out there can be actual loss of info by trimming to 10 bits.
If you care about details and want to avoid artifacts as much as possible - it is probably better to process the unbinned to the final result - and at that point decide how you want to put it on the web. There is no point in posting a 50MB image if it still looks fine at 1MB.
But at the same time - if you don't see any real benefit in unbinned acquisition vs. binned - even with a bit depth reduction - then it sure makes files smaller and processing faster. And less need for more hard drives. Which could outweigh other factors - depending on what you care about.
Edited by freestar8n, 10 October 2019 - 03:39 AM.