John...myequipment; 7D, 17-55 IS 2.8 and the 100-400. 70-200 isn't in my bag.....September?


Yes...I went to B&W to browse...$$$ and I've visited Singh-Ray $$, but as I stated earlier; I just want to give it a try to see if I'd have a long term interest in using filters....if so, then I'd consider purchasing the more expensive ones.


Bill