Hey guys, I have one cokin graduated ND filter for the cokin P system. However, the filter is not long enough. When I want the gradation to be very near the top of the frame, the bottom of the filter ends up right in the frame and leaves an edge in the exposure. So cokin filters do not seem to do the job for this. Can anyone recommend a filter that is long enough so that I can place the gradation anywhere I want in the frame? Also, I do not want to spend a lot of money, so a cheapest possible filter recommendations please! (other than cokin, unless they started making longer filters). Also, if I had to buy just two grad ND filters, which ones should they be? Thanks.