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Old 16-07-2014, 08:40 PM
glend (Glen)
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glend is offline
 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 5,348
I usually shoot DSOs at ISO800, simply because I read a recommendation that it was the best choice for the Canon 450D.

What do your Darks look like? What is the ratio of Lights to Darks? Are you using Bias Frames as well in your stacking?

I sometimes switch to ISO1600 when I am attempting to focus but I drop it back to 800 for the exposure run.
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