SLR Lenses / Canon Lenses

Canon EF 17-40mm f/4L USM

Canon EF 17-40mm f/4L USM

Ultra-wide high performance zoom lens offering excellent image quality
Dust-proof and moisture-proof construction
Rear focusing and ring USM for silence and high-speed AF
2 UD and 3 types of aspherical elements reducing chromatic aberration of magnification and providing superb image quality
Non-rotating front element during focus

Accessories

• Lens hood EW-83E
• Lens cap E-77U
• Lens case LP1319 (soft case)
• Dust cap E

Specifications

Focal Length & Max. Aperture: 17-40mm 1:4 
Filter Diameter: 77mm 
Magnification with Extension Tube EF12: 0.83x - 0.32x 
Magnification with Extension Tube EF25: 1.02x - 0.70x 
Diagonal Angle of View: 104° - 57° (43.2mm) 
Horizontal Angle of View: 93° - 49° (36mm) 
Lens construction: 12 elements in 9 groups 
Minimum aperture: f/22 
No. of aperture blades: 7 (circular aperture)
Closest focusing distance (m): 0.28m 
Focus drive: Ultrasonic 
Dimensions: 83.5mm dia. x 96.8mm 
Weight: 475g