Canon EF 400mm f/2.8L IS USM Instructions Manual page 21

Specifications
Focal Length/Aperture
Lens Construction
Minimum Aperture
Angle of View
Min. Focusing Distance
Max. Magnification
Field of View
Filter
Max. Diameter and Length
Weight
Hood
Lens Cap
Case
EF500mm f/4L IS USM
500 mm f/4
13 groups, 17 elements
f/32
Diagonal: 5°
Vertical: 2° 45'
Horizontal: 4°
4.5 m/14.8 ft.
0.12×
Approx. 197 × 297 mm/
7.8 × 11.7 inch (at 4.5 m/14.8 ft.) 8.0 × 12.1 inch (at 5.5 m/18.0 ft.)
Any 52-series drop-in filter
146 × 387 mm/5.8 × 15.2 inch
3870 g/136.5 oz
ET-138
E-163
Lens case 500
EF600mm f/4L IS USM
600 mm f/4
13 groups, 17 elements
f/32
Diagonal: 4° 10'
Vertical: 2° 20'
Horizontal: 3° 30'
5.5 m/18.0 ft.
0.12×
Approx. 204 × 306 mm/
168 × 456 mm/6.6 × 18.0 inch
5360 g/189.0 oz
ET-160
E-185
Lens case 600
ENG-20