I purchased this lens as a replacement for my 18-55 kit lens because I wanted a longer focal range for my 'walk around' outdoor lens. Unfortunately, something financially has come up and so I am forced to sell this lens before I even got to use it. Here are some specs: Sigma 28-105 f3.8-5.6 UC III Aspherical IF for Canon Mount Lens Construction: 13 Elements in 12 Groups Diaphragm Blades: 7 Minimum Aperture: f22 Minimum Focusing Distance: 50cm / 19.7 in Max Magnification: 1:5.6 Weight: 9.7 oz. Comes with Both front/back lens caps and Lens Hood to reduce flare. Item is Brand New In Box. Only opened to take pictures of item. Comes with all warranty paperwork, 1 year manufacturers warranty. Asking price is $80 Shipped in the continental U.S. only. Paypal is only accepted form of payment.