Canon 70-300mm f/4-5.6L EF IS Telephoto Zoom USM

Designed to deliver ultra-high quality images along with lightning fast operation, the new Canon 70-300mm f/4-5.6L EF IS Telephoto Zoom USM Lens brings a favorite zoom range to the celebrated Canon L-series of lenses. It features two Ultra Low Dispersion (UD) elements for improved image quality and reduced chromatic aberration, and incorporates a floating focusing mechanism for sharpness from close up to infinity

The Canon EF 70-300mm f4-5.6L IS USM DSLR lens includes distance metering information, providing compatibility with the E-TTL II Flash system of late model cameras such as the EOS-1D Mark II N and EOS 5D . When used in conjunction with Canon's range of EX Speedlite flash units, the lens passes distance information to the flash Algorithm for markedly improved flash Exposure metering. The most influential upgrade, however is the Image stabilization capability when used with compatible cameras.

Featuring the latest 3-stop Image stabilizer for outstanding camera shake reduction, the EF 70-300mm f4-5.6 IS USM zoom lens also features super responsive and silent Autofocus capabilities.

This allows shutter speeds up to three stops slower than would otherwise be possible, with no perceptible increase in image blur. Photographers normally shooting a 300mm frame handheld at 1/500 second can obtain the equivalent result with a shutter speed of just 1/60 second, vastly extending options in low-light conditions.

Gyro sensors detect unwanted vibrations, triggering the corresponding movement of a correcting lens group perpendicular to the Optical axis. This alters the light path, returning the image to its correct position on the sensor or film plane.

The Canon EF 70-300mm f4-5.6 IS USM provides 2-mode IS for shooting immobile subjects. Mode 1 stabilizes the image along both the horizontal and vertical axes. For shooting while panning to follow a moving subject, Mode 2 turns off correction in the panned direction and prevents the effect of dragging the subject back through the frame. "IS" switches off automatically when the camera is mounted on a tripod, thus preventing feedback loops between the "IS sensor" and stabilizer motor vibrations.

The micro USM motor found in the EF 70-300mm f4-5.6 IS USM employs ultra-sonic frequency vibrations to drive Auto focus with unrivalled speed and near-silent operation. Good holding torque stops the lens with precision and accuracy, the instant it arrives at the correct focus point and without overshoot. A high-speed CPU and optimized AF algorithm result in a significant increase of AF speed compared to that of its predecessor. A zoom ring locking mechanism is provided that locks the zoom at the wide-angle setting. This ensures that the lens is carried or stored in its most compact position, preventing possible damage caused by the lens extending and hitting obstacles when being carried mounted on a camera with a strap.