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Blue images with very slow shutter speeds

Rohinton_Mehta

Mumbai, IN
530 posts

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Rohinton_Mehta Silver Member Nikonian since 16th Feb 2002
Mon 15-Aug-11 01:35 PM

Yesterday, I was shooting flowing water with my Panasonic GF1 and 14-45mm lens. I used a ND 4, plus two CPLs as I wanted a very slow shutter speed. Wanted to see the effect of 10+ second exposure. Even tried without the ND filter, using only the 2 CPLs as a variable ND filter.

To my surprise, the pictures turned blue! I was using auto white balance. Tried the shots again with Daylight, and Cloudy white balance settings but the results were similar.

We know that digital image sensors don't suffer from reciprocity failure, but then why did the pictures turn blue?

Rohinton

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