Samples: Canon EF400mm f/5.6L USM

Samples: Canon EF400mm f/5.6L USM

mount: Canon EF
format: Full Frame
year: March 1993
max aperture: f/5.6
min aperture: f/32
elements/group: 7/6
aperture blades: 8
min focus distance (mm): 3500 (limiter at 8500mm)
filter diameter (mm): 77mm
length (mm): 256.5mm
weight (g): 1250 gram

There are three versions of this lens, the basic design remained the same, but the STM version has a closer MFD.

Additional information: From Canon Camera Museum

A compact and lightweight 400mm super telephoto AF lens driven by a ring USM (Ultrasonic Motor). The optical system incorporates one Super UD (Ultra-low Dispersion) glass lens element (2nd) with an optical effect similar to fluorite, and one UD glass element(5th), comprehensively eliminating the secondary spectrum and realizing extremely sharp, high-contrast imaging performance at almost same level as EF400mm f/2.8L USM. Other professional features are: a built-in lens hood with locking mechanism, dual manual focusing rings, a removable ring-type tripod mount, full-time manual focusing, and focus range selector for 3.5m to infinity or 8.5m to infinity. Extenders EF1.4X and EF2X can be used with manual focusing.

Remark: the A7r2 focusses this lens with the 1.4 extender attached.