The Nikon AF-S Nikkor 24-70mm f/2.8G ED N is a professional grade wide angle zoom lens with a fast constant aperture. It's designed to cover FX format sensors on Nikon Digital SLR cameras and it's useable on some late model Nikon 35mm film cameras (bodies possessing built-in aperture controls). While optimize for the FX image area, because of it's high end capabilities and performance, the Nikon AF-S Nikkor 24-70mm f/2.8G ED N is also very popular for use on DX format Nikon DSLR cameras and is frequently chosen over competing DX format lenses.