Thread: Help with taking Flats
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Old 18-01-2012, 01:18 PM
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DavidTrap (David)
Really just a beginner

DavidTrap is offline 		 
Join Date: Jun 2009
Location: Brisbane
Posts: 3,033
Definitely the secondary shadow.

I went down the light box route to get 3+ second exposures to avoid any shutter blur with shorter exposures on my QSI.

DT
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