Canon EF 400mm f/4 DO IS II USM

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Canon EF 400mm f/4 DO IS II USM

From the manufacturer

The EF 400mm f/4 DO IS II USM lens delivers brilliant high-speed performance for professionals with minimal glare and superb image quality. Taking advantage of the best in lens technology, it features gapless dual-layer diffractive optical elements for improved diffraction efficiency with reduced flare. These elements are arranged with a large-diameter ground aspheric lens and a UD lens for a new level of sharpness and clarity. New coatings help to reduce ghosting, ensure excellent color balance and reduce fingerprints on the front and rear of the lens.

Professional L-series dust- and water-resistant construction is complemented by impressive performance: a 3 mode Image Stabilization system offers up to four stops of compensation and can even prevent operational errors when the camera is mounted on a tripod. AF stop buttons placed on the front of the lens can automatically stop focusing at any time; full time manual focus ensures complete control no matter the AF mode, and a Power Focus (PF) mode makes for smooth focus transitions when shooting movies. The EF 400mm f/4 DO IS II USM focuses down to 10.8 ft. (3.3 meters), has a 9-blade aperture for pleasing, soft, out-of-focus areas, and is constructed with environmentally friendly lead-free glass.

url to full description on Manufacturer's web site.
From Wikipedia

The Canon EF 400mm are seven super-telephoto lenses made by Canon. These lenses have an EF mount that work with the EOS line of cameras. These lenses are widely used by sports and wildlife photographers.[1]
Canon currently manufactures three 400mm prime lenses:
EF 400mm f/2.8L IS II USM[2]
EF 400mm f/4 DO IS II USM
EF 400mm f/5.6L USM
The EF 400mm f/5.6L USM is Canon's least expensive 400mm lens and one of the best deals for a super telephoto 400mm focal length lens in the industry. Exceptional sharpness, minimal vignetting, very low distortion, and superb handling of chromatic aberration means this lens does not require image corrections in digital post production software. Having a maximum aperture of f/5.6, it is relatively slow.
The 400mm f/4 DO IS II USM, which replaced an earlier version of the same lens in 2014,[3] is one of only two Canon lenses that make use of diffractive optics (the other is the Canon EF 70-300mm lens). The use of diffractive optics allows the lens to be significantly lighter than it might otherwise be, but at the cost of some image quality.[4][5]
These lenses are compatible with the Canon Extender EF teleconverters.

url to full article on Wikipedia.
MSRP 6899 US$ Aperture (large) f/4
Announced Magnification 0.13x
Length 233mm Minimum focusing distance 3.3m
Weight 2100gr Focal 400 mm
Filter diameter mm Diaphragm blades 9
Manufacturer Canon Color White
Mount Type Canon EF Category Prime, Super telephoto
Published reviews
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WEathersealing, CIrcular aperture, FUll time manual focus, STabilization, FT:Filter threads, COnstant minimum aperture,
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2015-03-12T05:30:29+00:00