Canon EF 17-40mm f/4.0L USM

Specifications:

Focal Length 17-40 mm
Min. Aperture f/4.0  
Max. Aperture f/22  
Blades: 7  
Elements: 12  
Groups: 9  
Min. Foc. Dist. 0.28 m
AF: yes  
Stabilization: no  
Class: Full Frame  
Mount: EF  
Filter: 77 mm
Length: 96.8 mm
Diameter: 83.5 mm
Weight: 500 g
Launch: 2003  

Results:

Resolving Power: 658 σ = 0.0
Contrast: 645 σ = 0.0
Color: 624 σ = 0.0
Bokeh: 609 σ = 0.0
Star: 713 σ = 0.0
Distortion: 752 σ = 0.0
Falloff: 739 σ = 0.0
Flare: 882 σ = 0.0
LaCA: 939 σ = 0.0
LoCA: 894 σ = 0.0
LenScore™ 741 σ = 0.0

Number of lenses measured: 1
 

Comment:

Remeasured in July 2013.

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