Variable ND filters

[DerekVallintine]

Alan, I have a D300 and I put a Tiffen 77mm Variable ND filter on my 17-35 2.8 lens at 17mm. The results were good with full coverage throughout the images. No colour distortion or fringing but bear in mind the sun was hidden by clouds.

But when I shoot in sunlight I get black blotches in the image that I can't get rid of.

So my recommendation is to shoot on a cloudy day and you will get good images with good contrast and colour.

I hope this helps Derek