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Old 29-09-2009, 11:23 PM
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leinad
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leinad is offline
 
Join Date: Feb 2008
Location: Perth, WA
Posts: 1,307
Researching some more tonight, the annoying line noise occurs at ISO800 or higher even with High ISO NR, etc On.
At ISO400 I don't notice it. Whether it be 1/8000 or 1sec exposure.
With the higher gain of ~x4 of the 40D over the 400D/350D, Ive read that a 40D shot at ISO100 is equivalent to the latter at ISO400 at same exp times.

I'm going to try ISO400 10min next time, instead of ISO800 5mins.

Need to make a lightbox this week so I can apply a proper processing routine. Just need to decide how to build the box for my needs.
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