[blumesan]

Originally Posted by jfrancho

ND filters? - Canon Digital Photography Forums

Color cast is the issue. it turns out Coking "neutral gray" are not neutral.

I have read that statement many times on several internet sites. However I have never seen a posted image that demonstrates the issue. I have a Cokin ND grad filter that I use occassionally with film. I have not seen any suggestion of a color cast.

Cheers/Mike

P.S. John, it is Cokin, not Coking.