... , 55mm, 58mm,62mm, 67mm, 72mm, 77mm, 82mm White balance lens cap for CanonModels we supply: 52mm, 55mm, 58mm,62mm, 67mm, 72mm ... . Accurate white balance setting is as easy as putting the cap back on the camera, point the camera at the light ... time on the computer after shooting.The White Balance Lens Cap includes a standard white dome for neutral white balance readings ...