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DSLR View Finder problems


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Been doing some darks - in daylight/shade with the camera body capped and found a problem caused by light getting into the viewfinder and from there onto the CCD:

My camera body has a viewfinder shutter so with that closed I get:

These were in daylight but shooting at night with LED lights around and long exposures could cause a similar problem.

Need to make sure the viewfinder shutter is closed or that the view finder eyepiece is covered during exposures
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