Camera House Canon 52GFHWII Drop-in Gelatin Filter Holder

52mm Drop-in Gelatin Filter Holder 52 (WII) These glass-backed holders accept up to three commercially available cut-to-size gelatin filters for rear-insertion lenses. For your EF 200mm f/2L IS USM, EF 300mm f/2.8L IS USM, EF300mm f/2.8L IS II USM, EF 400mm f/2.8L IS II USM, EF 400mm f/2.8L IS USM, EF 400mm f/4 DO IS USM, EF 500mm f/4L IS USM, EF 600mm f/4L IS USM, EF 800mm f/5.6L IS USM.