Tamron's fast telephoto SP AF300mm F/2.8 LD (IF) delivers remarkable and exacting performance demanded by professionals. Two large LD (Low Dispersion) elements in the front lens group provide high contrast and crystal-clear image quality from the full open aperture. With Internal Focusing, you can maintain optimum holding balance since the lens' overall length remains constant during focusing. The Floating Focusing System improves optical performance especially at close shooting distances. Nine specially-shaped aperture blades form a nearly perfect circle to create excellent background blur for outdoor portraits. The true value of this lens is apparent when photographing sports action, low light theater performances, and wildlife.New is a Canon version that provides an easy-to-use AF/MF focusing ring, rear filter insertion frame that is compatible with the standard accessory circular polarizing filter and with the ring rotation capability from outside the lens, and detachable tripod mounting stand. Switching between AF and MF is easily accomplished by sliding the focus ring back and forth. Manually focusing is smooth and precise with the focusing ring. more info

The Tamron SP AF70-200mm R/2.8 Di LD [IF] Macro for Nikon AF Mount is the newest in Tamron's long line of high quality lenses. This light weight ultra fast telephoto zoom lens has a maximum aperture of f:2.8. No matter where you zoom, this lens will retain this fast aperture, great for low light or sports photography. The built in macro feature of this lens gives great close up capabilities with a magnification ration of 1:3.1. Designed to use on both full frame and APS sized sensors and constructed with 18 lens elements in 13 groups you will be able to product razor sharp images no matter what camera body you use. Attach the included tripod mount for enhanced balance and stability. Feature packed, this lens comes standard with lens hood, case, and Tamron's unsurpassed 6 year manufacturers warranty. more info

The Tamron SP AF70-200mm R/2.8 Di LD [IF] Macro for Sony AF Mount is the newest in Tamron's long line of high quality lenses. This light weight ultra fast telephoto zoom lens has a maximum aperture of f:2.8. No matter where you zoom, this lens will retain this fast aperture, great for low light or sports photography. The built in macro feature of this lens gives great close up capabilities with a magnification ration of 1:3.1. Designed to use on both full frame and APS sized sensors and constructed with 18 lens elements in 13 groups you will be able to product razor sharp images no matter what camera body you use. Attach the included tripod mount for enhanced balance and stability. Feature packed, this lens comes standard with lens hood, case, and Tamron's unsurpassed 6 year manufacturers warranty. more info