Canon EF 400 产品宣传页

Optics

17 elements, in 13 groups

One  (8th element)

Two  (2nd and 3rd elements)

Super Spectra coating used on all elements

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

Autofocus

Ring-type Ultrasonic Motor

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

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

Diaphragm

ƒ4 ~ ƒ32, settable in 

1

⁄

3

,

1

⁄

2

, or full steps, depending upon camera body used

Eight

Image Stabilization

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.)

Weather Resistance

• 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

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

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

Exclusive polyethelene trunk case

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)

Dimensions & Weight

9.4 x 5.0 inches  (232.7 x 128mm)

4.3 lbs.  (1940g)

New Product Specifications

EF 400 ƒ4.0 

IS USM