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Long exposure problem


Hurricane, US
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blubdog Silver Member Nikonian since 29th Sep 2008
Thu 06-Dec-12 08:00 PM | edited Thu 06-Dec-12 08:09 PM by blubdog

I had a problem with some long exposure photos of a beach in sunlight. The overall exposure is fine, but the clear sky turned out very uneven, from very dark blue to almost white.

D700, 16-35mm, ISO 100 (low-1), F/22, 8 seconds. Singh-Ray Var-ND-Duo set to block 8 stops.

Any idea what caused this? I have a whole bunch of photos from the same shoot with the same problem, so the problem is consistent.

I'm guessing it may be the Var-ND-Duo and the way it's mechanism variably blocks light, but before I go spending money on one of their new 10-stop filters, I'd like to be sure.


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