With a large aperture of f/2.8, the EF 400mm f/2.8L IS II USM is an ultra-high-performance super-telephoto lens delivering exceptional image quality in a durable design using magnesium alloy and titanium to reduce weight.

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.

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.

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.

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 further to AF speed. Full time electronic manual focus override is available without having to switch out of AF.

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		5°10', 3°30', 6°10' 16/12 9 f32 2.7 0.17 Provided 4-stops Ring USM3
Physical Specifications
	Dust/moisture resistance4 Filter diameter (mm) Max. diameter x length (mm) Weight (g)	Yes 52 Drop in 163 x 343 3850
Accessories
Lens Cap Lens hood Magnification with Extension Tube EF12II Magnification with Extension Tube EF25II Extender Compatibility Other Accessories		E-180D ET-155(WII) Hard case 400C 0.21-0.03 0.26-0.07 Compatible Canon drop-in 52mm filters