I am in the process of buying the Canon 16-35 f/2.8L lens. This lens takes a 82mm polarizer filter. I see B+W has two kinds of filters for this type of lens, the slim version and the extra wide glass version. I know about the slim version and the push on cap. The extra wide glass version is to prevent vignetting, the accessory thread on the front is larger. This allows you to use a 92mm snap on cap. My questions are, has anyone use the extra wide glass filter? Is it worth the extra money? Can you use the hood with this filter on? I guess you can take the filter off, install the hood and then reattach the filter.