Hi All,
I am just starting out with astrophotography. I have been using my ASI294MC Pro and have been creating a dark library. However, my dark frames are more of a medium shade of grey and not the black with a mottling of noise that I was expecting.
I was wanting to know if this was normal with an OSC camera, or should I be seeing an almost black image? All of the examples of dark frames that I have seen online show an almost black image with a smattering of electronic noise and the odd mis-behaving pixel.
I have been taking the darks at night, with my photo kit connected to the OTA, sitting in a ventilated (cool) room. I am taking 100 darks for several times (30, 60, 90, 120, 180 seconds), with all of them running on the cooled camera at -10 deg C and a gain setting of 120. I am able to eliminate all light from the room, so there is no light leakage. I am using an ASIAIR Pro to take the pics and have set up a Autorun task to automate the process.
I've attached two pics - one is 60 seconds and the other is 90 seconds (the one with brighter amp glow is the 90 second one).
Am I doing something wrong, or do these look normal?
Thanks in advance for any assistance.
