Quote:
Originally Posted by Camelopardalis
One thing I've picked up from random threads around the interweb is that the output you get from grabbing the image through the ZWO SDK and via the ASCOM driver may not be same...although I haven't tested this, since I use the ASCOM driver exclusively (so far).
The end result could be that the calibration frames don't match if you recorded lights using something like SharpCap (that can actually use the SDK or the ASCOM driver - a good place to test!) but generate your darks using an ASCOM driven program, like APT or SGP. Not sure why you would want to do that, but it's something to be aware of.
Like I said, I haven't tested this myself so take with a cup full of salt...
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+1. I got very different darks biases etc with the zwo and ascom drivers in sharpcap. Even when I set the brightness to what I thought was the offset equivalent in ascom.
It's easier now. The ascom for zwo cameras just sets the offset to 50.
I just go with unity gain and do 90 or 120sec subs. Just stick your values in the Shiraz spreadsheet. I'm guessing it should tell you that somewhere around there is optimal for this sort of cmos camera.