Tamron AF 17-35mm f2.8-4 Di OSD for Canon & Nikon

EF-Mount Lens/Full-Frame Format
Aperture Range: f/2.8 to 22
Fluorine and BBAR Coatings
Optimized Silent Drive AF Motor
TAP-in Console Compatible
Leak-Proof Lens Seals
Rounded 7-Blade Diaphragm

Mount: For Canon For Nikon
Lens construction: 10 groups of 15
Shortest shooting distance: 0.28 m
Maximum magnification: 1: 4.9
Filter diameter: 77 mm
Size: 83.6 mm 92.5 mm (For Canon)
Weight: 460 g