Canon EF 200-400mm f/4L IS USM Telephoto Zoom Lens with Built-in 1.4x Extender - Professional Wildlife & Sports Photography Lens for DSLR Cameras - Perfect for Bird Watching, Safari, and Outdoor Action Shots

With a simple flick of a switch, the zoom range can be quickly increased to 280-560mm (f/5.6). This capability is extremely useful in applications where it is not possible to change lenses quickly, while also protecting delicate equipment such as a digital SLR camera’s image sensor in environments with dust and high humidity.

Extender 1.4X incorporates one fluorite and four UD lens elements, which provide excellent correction of chromatic aberration throughout the entire zoom range for professional quality images with high resolution, contrast and colour fidelity, while a 9-blade circular aperture helps deliver beautiful, soft backgrounds It utilises inner focusing, ring USM, a high-speed CPU and optimised AF algorithms for fast and accurate autofocusing.

Specifications

Lens Type / Category Zoom Lenses

Angle of View (horzntl, vertl, diagnl) 10° - 5°10', 7° - 3°30', 12° - 6°10' with extender 7° 20'- 3°40', 4° 55'- 2°25', 8° 50' - 4°25'

Autofocus Yes

Diaphragm Blades 9 Dimensions 128 x 366 mm

Filter Thread Rear:52 mm Bayonet II

Focal Length 200 - 400mm Comparable APS-C 1.6x Focal Length: 320 - 640 mm

Format Compatibility 35mm Film / Full-Frame Digital Sensor Canon (APS-C)

Groups/Elements 20/25

Image Stabilization Yes

Magnification 0.15x

Maximum Reproduction Ratio No

Minimum Focus Distance 6.56' (2.00 m)

Tripod Collar Yes Fixed - rotating