Camera Lens - Canon EF 17-40mm f/4L USM Wide-Angle Zoom Lens
-Lens Type: Wide-Angle Zoom Lens
-Mount: Canon EF Mount
-Compatible Cameras: Canon Full-Frame & APS-C DSLR Cameras
-Focal Length: 17–40mm
-Maximum Aperture: Constant f/4
-Minimum Aperture: f/22
-Autofocus: Ring-Type USM Autofocus Motor
-Focus System: Internal Focusing
-Manual Focus: Full-Time Manual Focus Override
-Optical Elements: 3 Aspherical Elements + 1 Super UD Element
-Lens Coating: Super Spectra Coating
-Diaphragm Blades: 7 Rounded Blades
-Filter Size: 77mm
-Weather Sealing: Dust and Moisture Resistant
-L-Series Professional Lens
-Fast, Quiet, and Accurate Autofocus Performance
No Specifications