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Old 11th August, 2009, 10:20 AM
Aedan Aedan is offline
Chief Systems Administrator
Join Date: September 2001
Location: Europe
Posts: 13,075

It's the usual trick for averaging noise, on the basis that noise is random. Therefore, putting six pictures together helps to reduce the random noise that would appear in the picture. It also assumes that the objects being photographed don't move too much in the meantime!

It doesn't help with hot pixels either.
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