Hi Daniel,

If you're going to get just one GND, make it a 3-Stop hard edge. Make your 2nd one a 3-Stop Reverse GND. You'll also need to get a filter holder (Lee make the best, Cokin are the other main brand). Filter holders are needed because in reality you need slide type filters (I use 6" x 4" Singh-Ray filters - www.singh-ray.com) - don't waste your money on screw in type GND filters because you cant move where the split is.

Happy to give you more links and help if you need them.

Cheers,

Colin - pbase.com/cjsouthern