Canon 52mm Drop in Screw Filter Holder. The enclosed regular filter can be exchanged with other commercially available screw-type filters. Note that only filters with correct filter frame thickness can be mounted on the lens.
The 52mm Drop-in Filter Holder from Canon is used with super long telephoto lenses that accept 52mm screw-in filters. The holder drops-in to the rear of long Canon lenses and is easy to insert and remove.
Allows 52mm diameter filters to be used in Canon super-telephoto lenses that take drop-in filters. Use conventional 52 mm screw-thread filters with selected Canon super-telephoto lenses.
Simply insert the filter into the adapter 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.
— EF 200mm f/2L IS USM
— EF 600mm f/4L IS USM
— EF 800mm f/5.6L IS USM
— EF 400mm f/2.8L IS USM
— EF 600mm f/4L IS II USM
— EF 400mm f/4 DO IS USM
— EF 500mm f/4L IS II USM
— EF 500mm f/4L IS USM
— EF 400mm f/4 DO IS USM Refurbished
— EF 300mm f/2.8L IS USM