The SBIG ST-i is both clean (class 1 chip) and sensitive. It also has the advantage of having a small mechanical shutter which allows proper darks to be shot. I have now had a play in maxim with the ST-i and where my CMOS guider used to cause mayhem with the guiding through hot pixels even after darks were applied, the ST-i has no such problems. All it needs is a simple auto dark and away it goes, super clean guide subs for maxim to work with.
Mark
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