Is anyone here using a CMOS Camera for variable star photometry? In the past I have used FLI and SBIG NABG CCD cameras, which were ideal for photometry, but sold them a few years ago. I now have a Canon DSLR and an Altair Astro Hypercam IMX174 CMOS Camera. I know DSLRs can be used for photometry, but what about my CMOS camera? I notice there are some limited discussions on the AAVSO forums regarding CMOS cameras and photometry and it looks like some observers are having success with them, but there isn’t much info there at the moment. I would like to do some photometry again later in the year, but I don’t want to spend money on another CCD if my existing CMOS can do the job.
The 12-bit quantization and corresponding well-depth isn’t really a problem since CMOS sensors have very low read noise so the normal way of using them is to externally co-add multiple short exposures. This has many advantages over a single long exposure.