Use gelatin filters with selected Canon super-telephoto lenses. Simply insert the filter into the holder and drop the assembly into the lens drop-in filter slot. The colour of the Canon 52 (WIII) filter holder will differ from the colour of the body of super telephoto lenses other than the EF 400mm f/2.8L IS III USM and EF 600mm f/4L IS III USM. This will not affect performance and the filter holder is fully compatible otherwise.BenefitsUse gelatin filters with super-telephoto lensesCreate special effects and reduce brightness with ND filtersCompact and portable, so it can always be in your bagMaintains the weather sealed protection against dust and moistureUse gelatin filters with selected Canon super-telephoto lenses. Simply insert the filter into the holder and drop the assembly into the lens drop-in filter slot. The colour of the Canon 52 (WIII) filter holder will differ from the colour of the body of super telephoto lenses other than the EF 400mm f/2.8L IS III USM and EF 600mm f/4