jimpete

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<p>Thanks for the responses. That is helpful. I am dialed in with screw in filters and will continue that route. I may have to bite the bullet and buy two or three expensive 82mm filters.</p>

<p>I currently have the 17-40 and love to stack filters (Screw on type). I like to stack a normal thickness polarizer with various ND filters for landscape shots. I use a 5D MarkII. I noticed that I get a lot of vignetting with this arrangement at less than 20mm. It is kind of nice on some shots to have that last bit of wide angle with no vignettting so as not to have to deal with cropping and post processing. I was wondering if the 16-35 F4 might be better at less vignetting and if anyone has experience with a slim polarizer with the above lenses and whether this improves the situation. If the 16-35F4 is better (with less vignetting) then it may be worth swapping lenses for a $500 difference. Perhaps someone has figured a practical workaround to reduce vignetting with screw in type filters at 16-19mm with these lenses. Thank for any help. </p>

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