Choosing a gain setting - what noise is this?
For years I have used a fixed-gain CCD camera, first an Sbig ST-10, then QSI 532, both with the wonderful Kodak KAF-3200M chip. The 532 has died, and finding a QSI 632 on the market, which also has the same chip, I bought it only to discover that it operates with either a high (.9) or Low (2) gain setting instead of the fixed 1.29 of the prior cameras, bringing an unwanted complexity to my program.