Canon EF 400 User manual

Optics

Optical construction 17 elements, in 13 groups

Fluorite elements One (8th element)

Diffractive Optics elements Two (2nd and 3rd elements)

Multi-coating Super Spectra coating used on all elements

Image Stabilization optics Three element group toward rear of lens (elements 11~13)

Autofocus

AF motor Ring-type Ultrasonic Motor

AF speed Equivalent to new I.S. super telephotos (EF 300 ƒ2.8L IS, etc.)

Manual focus Mechanical full-time Manual focus, even with lens in AF mode, on any EOS camera

Minimum focus distance 11.5 feet (3.5m)

Maximum magnification 0.12x; fills the frame with a subject 11.6 x 7.7 inches (296 x 197mm)

AF limiter switch 1) 3.5m (11.5 feet) to infinity; 2) 2.8m (9.2 feet) to infinity

Diaphragm

Aperture range ƒ4 ~ ƒ32, settable in 1⁄3,1⁄2, or full steps, depending upon camera body used

Number of diaphragm blades Eight

Image Stabilization

Stabilizer operation Activated by pressing shutter button half-way

Stabilizer effectiveness Up to two stops

Stabilizer modes • Mode 1: General hand-held shake prevention

• Mode 2: Correction for deliberate panning with a moving subject

Tripod operation Lens automatically switches Image Stabilization control within 1 second if solid mounting

is detected (similar to EF 300 ƒ2.8L IS, etc.)

Weather Resistance

Weather-resistant construction • Rubber ring at lens mount (similar to EF 300 ƒ2.8L I.S., etc.)

• Switch panel is gasketed

• Manual focus and “playback” rings feature special over-lapping weather-resistant design

Accessories

Filter size 52mm rear drop-in (gelatin filter holder included; screw-in and dedicated Polarizer available)

Lens Hood ET-120 carbon-fiber (same as EF 300 ƒ2.8L IS lens)

Lens case Exclusive polyethelene trunk case

Tripod mount Removable (same as EF 300 ƒ2.8L IS lens)

Tele Extender compatibility Fully compatible with all Canon EF tele extenders

• EF 1.4x / 1.4x II: full AF with any EOS body

• EF 2x / 2x II: AF possible at center focus point only with EOS-1v and EOS-3 bodies

Extension Tubes EF 12, EF 25 Fully compatible (max. magnification: EF 12–0.16x; EF 25–0.20x)

500D close-up lens Not compatible (will not fit)

Dimensions & Weight

Dimensions; length x ø 9.4 x 5.0 inches (232.7 x 128mm)

Weight 4.3 lbs. (1940g)

Canon Lens

New Product Specifications

EF 400 ƒ4.0 DO IS USM

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