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
