Fotodiox introduces extra large WonderPana Free Arc system for Canon EF 11-24mm wide zoom

US accessory manufacturer Fotodiox has announced an XL version of its WonderPana Free Arc filter system for wide angle lenses that it says is designed specifically to allow users of the Canon EF 11-24mm F4L USM lens to use filters over the front element. The Canon super-wide zoom has no filter thread of its own and the front element is heavily convex, so fitting filters in the traditional way is impossible. The WonderPana Free Arc system positions a filter holder over the front of the lens that ...