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Old 12-04-2012, 10:57 AM
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gregbradley is offline
Join Date: Feb 2006
Location: Sydney
Posts: 16,414
I made a variable filter by simply fitting 2 polarisers on top of each other. Rotate one and they vary to almost black (mine goes a dark blue at the extreme end).

I have only done this once on a daytime shot of a fast moving stream to create motion blur.

The image looked fine on the viewfinder. I'll process it and see how it turned out.

I also ordered a cheapie variable nd filter. Not sure if vignetting is an issue with full frame. I am using a 40D for now.

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