Canon EF 400 Specifications

Optical construction
Fluorite elements
Diffractive Optics elements
Image Stabilization optics
Autofocus
Minimum focus distance
Maximum magnification
AF limiter switch
Diaphragm
Aperture range
Number of diaphragm blades
Image Stabilization
Stabilizer operation
Stabilizer effectiveness
Stabilizer modes
Tripod operation
Weather Resistance
Weather-resistant construction
Accessories
Tele Extender compatibility
Extension Tubes EF 12, EF 25
500D close-up lens
Dimensions & Weight
Dimensions; length x ø
New Product Specifications
Canon Lens
EF 400 ƒ4.0
Optics
17 elements, in 13 groups
One (8th element)
Two (2nd and 3rd elements)
Multi-coating Super Spectra coating used on all elements
Three element group toward rear of lens (elements 11~13)
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
11.5 feet (3.5m)
0.12x; fills the frame with a subject 11.6 x 7.7 inches (296 x 197mm)
1) 3.5m (11.5 feet) to infinity; 2) 2.8m (9.2 feet) to infinity
ƒ4 ~ ƒ32, settable in
Eight
Activated by pressing shutter button half-way
Up to two stops
• Mode 1: General hand-held shake prevention
• Mode 2: Correction for deliberate panning with a moving subject
Lens automatically switches Image Stabilization control within 1 second if solid mounting
is detected (similar to EF 300 ƒ2.8L IS, etc.)
• 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
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)
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
Fully compatible (max. magnification: EF 12–0.16x; EF 25–0.20x)
Not compatible (will not fit)
9.4 x 5.0 inches (232.7 x 128mm)
Weight 4.3 lbs. (1940g)
DO
1 ⁄ , 1 ⁄ , or full steps, depending upon camera body used
3 2
IS USM