Canon EF 200-400mm f/4L IS USM Extender 1.4x Lens (Canon EF)

The Canon 5176B013 is a premium EF-mount zoom that moves seamlessly from 200 to 400 millimeters and holds a bright f/4 aperture the entire way. It is built for photographers who spend their days tracking fast-moving wildlife, following the play from one end of the field to the other, or documenting birds in flight when every gram of sharpness counts.

A flip of a lever engages the integrated 1.4× extender, stretching the reach to 280-560 millimeters without the need to swap lenses or expose the sensor to dust. This design choice lets you react instantly when a distant subject suddenly appears, whether you are on a safari truck or standing behind the goal line at a night game.

Optical quality is anchored by a fluorite element and four ultra-low dispersion elements that keep color fringing under control and maintain high contrast. The four-stop Image Stabilizer steadies the frame for handheld work or panning, and a ring-type Ultrasonic Motor locks focus quickly while staying nearly silent, a benefit when you are working around skittish animals or during live broadcasts.

The housing uses full weather sealing to resist rain, dust, and temperature swings. A fluorine coating on the front and rear elements makes it easy to wipe away smudges after a long day in the field. The removable, rotating tripod collar balances the lens on a monopod or gimbal and lets you switch from horizontal to vertical framing in seconds. Mounted on an APS-C body, the lens provides an angle of view similar to 320-896 millimeters, giving birders and aviation enthusiasts even more effective reach.

• Zoom range of 200-400 mm covers medium to super-telephoto subjects
• Built-in 1.4× extender shifts reach to 280-560 mm with a single lever
• Constant f/4 maximum aperture maintains exposure across the zoom
• Fluorite and ultra-low dispersion glass minimize chromatic aberrations
• Image Stabilizer offers up to four stops of shake compensation
• Ring-type Ultrasonic Motor delivers fast, almost silent autofocus
• Weather-sealed construction withstands challenging outdoor conditions
• Fluorine coating on exposed elements repels water, oil, and fingerprints
• Removable rotating tripod collar improves balance and framing flexibility
• Works with full-frame and APS-C Canon EF-mount cameras