Reply To: Beginner Move from PEP to CMOS photometry › Forums › Photometry › Beginner Move from PEP to CMOS photometry › Reply To: Beginner Move from PEP to CMOS photometry 27 July 2023 at 9:33 pm #618279 Kevin WestParticipant Hello Robin, I still have my Optec SSP3 photometer but only Johnson IBVR filters. Limiting mag on a 20cm reflector for 0.02 mag accuracy was a measly 7.5mag. I don’t have a scope yet. Probably no use to you. Sorry Regards Kev
