I have a Canon 6D and I want to order a 17-40. I am wondering what filter I need, slim fit (slim size, ... whatever you call that) or regular size. If I use a regular size filter will I see vignetting?
In addition - is it possible to stack filter? E.g. add on top of the UV filter a pol filter or will I see vignetting? My question is not related to the mechanical possibility but just on the optical, so will I see at 17mm the filter in the picture?
Thanks a lot for any help.