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Old 17-07-2014, 10:06 AM
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Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline
 
Join Date: Feb 2013
Location: Brisbane
Posts: 4,979
Thanks Paul. I'm using a Canon 1100D. I've read a couple of things claiming the noise is lower at ISO1600 than ISO800 which sounds counterintuitive!

How many is "lots"? I'm guess it depends on the brightness of the target? Is there a general rule of thumb for exposure time vs magnitude, without going too much into the territory of diminishing returns.
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