Canon 28-85 mm lens is designed for use in the older Canon SLR manual cameras. Using this 28 mm - 85 mm f/4.0 lens with one of the newer EOS cameras would require the use of an FD to EF adapter, which would then require manual focusing of the camera and could possibly result in image degradation. This Canon camera lens is one of the most well rounded basic lenses that can be purchased for a Canon SLR camera. The 28 mm - 85 mm f/4.0 lens allows for both wide-angle and telephoto pictures, making the Canon 28-85 mm lens one of the most versatile lenses available. The Canon 28-85 mm lens has a zoom ratio of 3X, and maintains maximum aperture even at maximum zoom. This lens has optimal image aberration correction, eliminating flares. This Canon camera lens can be used for most picture taking needs, making it a good first lens purchase for a beginning SLR photographer.