Groups
9
AF Motor
usm
Elements
11
Weight
6450g
Length mm
348
Model Code
EF400MM-F2.8L-USM
Stabilized
No
Diameter mm
167
Max Aperture
f/2.8
Min Aperture
f/32
Discontinued
Yes
Min Focus Distance
400cm
Aperture Blades
8
Introduced
1991
Focal Length (Max)
400mm
Focal Length (Min)
400mm
Filter Drop In mm
48
Max Magnification
0.11