I am looking into purchasing a few Singh-Ray soft step ND grad filters. Their website refers to using it with the Cokin P holder, which is available cheaply online.
The only filter I've ever used is a screw on circular polarizer, so I am a little lost here. Ideally, how many filter slots do I want to have available, and which holder do you recommend? Is there anything I want to add to my setup? I have mainly 58mm and 77mm size Canon lenses.
Secondly, once I have the filters and the kit, do I need a special lens hood that will fit over this set up? I am assuming I won't be able to use the hoods which came with the lenses?
Finally, does anyone have any experience with the Singh-Ray Color Intensifying Filters? The results look interesting.