This full-size premium telephoto zoom with Extra Low Dispersion (XLD) element delivers best-in-class resolution, while Tamron’s own Ultrasonic Silent Drive (USD) and Vibration Compensation (VC) make the lens fast, quiet and easy to use. Designed for digital SLR cameras, it can be used with both full-frame sensor and AF 35mm cameras for a zoom range of 70-300mm. With APS-C sensor cameras the angle of view will change the zoom range to an equivalent of 109-465mm*. * Tamron’s conversion 1.55x. Aspiring to the most outstanding image resolution in the 70-300mm class, this lens utilises an advanced optical design featuring an LD (Low Dispersion) and an XLD (Extra Low Dispersion) lens element made from specialised materials that prevent chromatic aberration. As a result, it boasts sharper contrast and greater descriptive performance than all others in its class. It's also the first Tamron lens sporting a USD (Ultrasonic Silent Drive), Tamron’s very own ultrasonic autofocus drive mechanism. This USD mechanism delivers fast focusing, making it a perfect telephoto zoom choice for photographing sports, racing and other fast-moving subjects.