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Canon EF 17-40mm f4L USM Lenses

Canon EF 17-40mm f4L USM Lenses

Angle of View (diagonal)104° - 57°30'
Lens Construction12 elements in 9 groups
No. of Diaphragm Blades7
Minimum Aperturef/ 22
Closest Focusing Distance (m)0.28m
Maximum Magnification (X)0.24x
AF ActuatorRing USM
Filter Diameter (mm)77mm
Max. Length x Diameter (mm)96.8 x 83.5 mm
Weight (g)475g
  
Accessories 
Magnification with
Extension Tube EF 12 II		0.83x - 0.32x
Magnification with
Extension Tube EF 25 II		1.02x - 0.70x
Lens HoodEW-83E
Lens CapE-77U
Gelatin Filter Holder III (Hood III)*Not compatible
Gelatin Filter Holder IV (Hood IV)*(0)