Hi all, I'm sorry this one's another OT; I was hoping I could draw on the sea of experience on this list. Has anyone used a Cokin P system on a ultrawide zoom (17-35 or 19-35), and if so I was wondering if I could get some advice and tackling the vignetting problem. I've read some comments elsewhere about trimming down excess filter slots- has anyone here done this before?
Also, I'm curious as to whether it's possible to use a (screw on) SinghRay thinline gold/blue polariser together with an nd grad on a Cokin P, since I understand the thin g/b doesn't have an outer thread? I haven't used the Cokin P holder before, and I apologise in advance if all this sounds overly silly. Thanks, Ryan

