The EF 200–400 mm 4L IS USM Extender 1.4× is an EF mount super telephoto zoom lens produced by Canon. It is part of the professional L-series and functions with the Canon EOS line of cameras. The EF 200–400 mm lens features an ultrasonic motor, image stabilization and weather sealing. It is the first and only EF lens with a built-in extender.

History The EF 200–400 mm 4L was first announced to be in development in February 2011 and a prototype was showcased at the 2011 CP+ tradeshow. In November 2011, Canon announced that availability of the lens would be postponed to an unspecified later date. The lens was only released more than a year later in May 2013.

Built-in 1.4× Extender Although not the first lens to be equipped with a built-in teleconverter, an honor that belongs to the older Canon FD mount 1200 mm 5.6L 1.4× lens, the EF 200–400 is the first to be for the EF mount, and the first to enter mass production. The extender, when engaged, increases the lens' focal length by a factor of 1.4×, while decreasing the aperture by a single stop, changing the lens to a 280–560 mm f/5.6 lens. The extender is activated and deactivated by a mechanical switch close to the lens mount.

Specifications Attribute f/4L IS USM Extender 1.4× ImageKey features Image stabilizer Environmental Sealing Ultrasonic Motor L-series Diffractive Optics MacroBuilt in 1.4× ExtenderTechnical data Maximum aperture f/4 (f/5.6 with extender) Minimum aperture f/32 (f/45 with extender) Horizontal viewing angle 10°–5°10' (7°20'–3°40' with extender) Vertical viewing angle 7°–3°30' (4°55'–2°25' with extender) Diagonal viewing angle 12°–6°10' (8°50'–4°25' with extender) Groups/elements 20/25 (24/33 with extender) # of diaphragm blades 9 Closest focusing distance Maximum Magnification 0.15× (0.21× with extender)Physical data Weight Maximum diameter Length Filter diameter 52 mm drop inAccessories Lens hood ET-120 (WII) Lens Cap E-145C Case 200–400Retail information Release date May 2013 MSRP (US$) $10999.00

See also Sigma 200–500mm f/2.8 EX DG lens

References

External links

Lens overview from Canon USA Canon 200-400 6 Month Test Comparison with several other super-telephoto lenses by LensRentals.com Canon EF 200–400 Lens review by Bryan Carnathan