Groups
13
AF Motor
usm
Elements
17
Weight
1940g
Length mm
232.7
Model Code
EF400MM-F4-DO-IS-USM
Stabilized
Yes
Diameter mm
128
Max Aperture
f/4
Min Aperture
f/32
Discontinued
Yes
Min Focus Distance
350cm
Aperture Blades
8
Introduced
2001
Focal Length (Max)
400mm
Focal Length (Min)
400mm
Filter Drop In mm
52
Max Magnification
0.12
Diffractive Optics
Yes