With a large aperture of f/2.8, the EF 300mm f/2.8L IS II USM is a high performance super-telephoto lens delivering exceptional image quality in a durable and lightweight design.

The L-series is Canon's flagship professional lens range, representing the best in precision-designed EF optics. L-series lenses combine superior performance with superlative handling, and are highly resistant to dust and moisture.

A 4-stop optical Image Stabilizer – specially designed for the lens’ specific focal length range – works to counteract image blur, which can occur during handheld shooting, or at slow shutter speeds. Automatic panning detection ensures effective performance when tracking moving subjects and, as the IS system is based in the lens, results are visible through the viewfinder during framing.

Designed for use in digital photography, Canon’s patented Subwavelength structure coating helps minimise the ghosting and flare caused by internal reflections. By eliminating the cause, the coating reduces reflections and helps to deliver crisp, clear images.

Ideally suited for all types of action photography especially those disciplines that require the utilization of panning, the new IS mode 3 only activates the image stabilizer element during exposure.

A ring USM (Ultrasonic motor) uses ultrasonic frequency vibrations to drive extremely rapid auto focus with near-silent operation. A high-speed CPU and optimised AF algorithms contribute to fast AF performance. Full time electronic manual focus override is available without having to switch out of AF mode.

Optical Features/Specifications
Angle of view (horizontal, vertical, diagonal) Lens construction (elements/groups) No. of diaphragm blades Minimum aperture Closest focussing distance (m) Maximum magnification (x) Distance Information Image stabilizer AF actuator	6°50', 4°35', 8°15' 16/12 9 f32 2.0 0.18 Provided 4-stops Ring USM3
Physical Specifications
Dust/moisture resistance4 Filter diameter (mm) Max. diameter x length (mm) Weight (g)	Yes 52 Drop in 128 x 248 / 2400
Accessories
Lens Cap Lens hood Lens case/pouch Magnification with Extension Tube EF12 II Magnification with Extension Tube EF25 II Extender Compatibility Other Accessories	E-145C ET-120(WII) Lens Case 300B 0.22-0.04 0.28-0.09 Compatible Canon drop-in 52mm filters