This Altura Photo Filter is compatible with all 77mm lenses. Please verify your camera s lens thread size before ordering. Your camera s lens thread size will be marked somewhere on the lens barrel or printed underneath your lens cap. This number is always preceded by a "Ø" (diameter) symbol. For example: Ø77 = 77mm lens thread size Compatible with the CANON 24-105mm, 10-22mm, 17-40mm zoom lenses. Also compatible with the NIKON 28-300mm, 18-300mm zoom lenses. Filters UV rays and eliminates haze from scenic photos. Especially useful in areas of high altitude or snow. Filters are one of the least expensive accessories you can use to make big changes in the way your pictures look.