Hi
has anyone had any success making a variable neutral density filter using 2 circular polarisers?
see here: http://www.petapixel.com/2010/08/27/...ensity-filter/
You can also make an ND using a circular polariser and a linear polariser - this looks like it maybe be less trouble.
http://www.digital-photography-schoo...density-filter
I thought I'd give it a go this weekend
Russ