Canon EF 300mm f/4.0 L USM IS
A more portable 300mm telephoto lens. Two UD-glass elements effectively correct secondary spectrum. Superb resolution and contrast. Astigmatism is also corrected, and background blur is soft and nice. Built-in hood with a locking mechanism.

Feature
Diagonal Angle of View: 8° 15'
Lens Construction (elements/groups): 8/7
No. of Diaphragm blades: 8
Minimum Aperture: 32
Closest Focusing Distance (m): 2.5
Maximum Magnification (x): 0.13
AF Actuator: USM Filter Diameter (mm): 77

Product Specification
AF Actuator USM, Mechanical full-time manual focusing built-in.
Body
Closest Focusing Distance (m) 2.5
Diagonal Angle of View 8° 15'
Horizontal Angle of View
Maximum Magnification 0.13
Minimum Aperture 32
Lens Construction (elements/groups) 8/7
No. of Diaphragm Blades 8
Filter Diameter (mm) 77
Lens Hood Built-in
Hard Case LH-D26
Magnification with Extension Tube EF12 0.18-0.04
Magnification with Extension Tube EF25 0.24-0.09
EF1.4x AF (Y/N) Y
EF1.4x Focal Length (mm) 420
EF1.4x f-stop (f) 5.6-45
EF1.4x Maximum Magnification (x) 0.18
EF2.0x AF (Y/N) N
EF2.0x Focal Length (mm) 600
EF2.0x f-stop (f) 8-64
EF2.0x Maximum Magnification (x) 0.26
Max. Diameter x Length (mm) 90x213.5
Weight (g) 1,165