Canon EF 17-40 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