Canon WD30.5 .7x Wider Perspective Wide Converter for the ZR 80/85/90 Compatible for use with these Canon Camcorder Models - ZR10, ZR20, ZR25mc, ZR30mc, ZR40, ZR45MC, ZR50MC, ZR60, ZR65MC, ZR70MC Increases the wide angle coverage of the camera's lens by 0.7X Screws onto the front of the camera's lens Filter size - 30.5mm