Thread: ISO speeds
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Old 27-04-2008, 10:45 AM
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Geoff45 (Geoff)
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Join Date: Jul 2006
Location: Sydney
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Here's some food for thought. If you expose for 10min at 400 iso, then for 5 min at 800 iso, your two images will have the same brightness. However, you will have gathered twice as many photons in the 10 min exposure, so you will get a much smoother image. There is no such thing as a free lunch.
Geoff
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