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Steve,
Dark frames are no hassle at all
with CCD's ... you can shoot them anytime the air is cold enough for the
camera to reach the same temperature that you took the images... the modern
software makes combining the frames into a single "super" dark frame a snap ...
I wouldn't let this deter your forray into the dark side ... I even had the idea
of sticking the camera into the refridgerator during the day to get the dark
frames made ... but usually I'll anticipate what I'll be shooting a few days
prior and start running off dark frames while it's the full moon or cloudy ...
flat fields are actually more of a pain ... the best thing here is to design an
optical system where you don't need them.
Tony
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