Type :

Canon EF mount (metal).

Focal Length :

400mm.

Maximum Aperture :

F/4.

Optical Construction :

17 elements in 13 groups (2 diffractive optical elements and 1 fluorite element) with Super Spectra Coating.

Angle of View :

6 degrees 10 minutes (diagonal at infinity).

AF Drive System :

Ring type USM.

AF Drive Noise :

42 dB or lower.

Manual Focussing :

Enabled with focus mode switch and focus ring (full time mechanical MF mechanism).

Focus Range :

3.5m to infinity or 2.8m to infinity (switchable).

EF Signal Transmission :

5 types Lens status, Lens type, Metering information, Focal length, AF drive information.

Aperture Control :

Pulse control with EMD.

Aperture Range :

F/4 to F/32.

Aperture Blades :

8.

Filter Size :

Drop-in gelatin holder 52mm.

Hood :

ET120.

Lens Cap :

E-145II.

Lens Case :

Fitted.

Gelatin Filter Holder :

Drop-in at rear.

Dimensions :

128mm x 232.7mm.

Weight :

1940 grams.

As a result of the special optical characteristics of the multi-layer diffractive optical element, a ring of light may occasionally occur around extremely bright light sources such as mercury lamps in a night scene.:

All data based on Canon's Standard Test Method:

Subject to change without notice: