Product description mount; tilt shift lens Gaussian optics give high-quality delineation and true background blur 90mm focal length f/2.8 maximum aperture Manual focus only From the Manufacturer: With a Canon TS-E lens, you can control the angle of the plane of focus and the pictures perspective. The effects of large-format camera movements can be obtained with TS-E lenses for EOS cameras. Although manual focusing is required, automatic aperture control enables auto exposure and auto exposure bracketing. The tilt and shift axes intersect at a 90 Degree angle. They can be made parallel at an authorized Canon Service Facility (modified at owners expense). Telephoto perspective, f/2.8 speed, and full tilt and shift movements in a compact, professional package. Impressively sharp, its ability to alter the plane of focus can provide a "look" that previously required a view camera to achieve. Pros have found it a great option for portraits, products and even fashion work. At its closest focus distance (1.6 ft./0.5m), it gives magnifications of about 1/3 life-size.