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Sounds exciting. Now don't be naughty and get lazy and do 20 subs at 30 seconds ISO12800 and think that will do. You still need total exposure time to get the details and depth. On ED180 you've got both aperture, speed and a very sensitive camera but it doesn't let you off the hook and do 3 minute total exposure times!
Remember ISO is merely amplified signal. You still need to get the signal.
Greg.
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