This is the Tokina 17-35mm f/4 AT-X PRO FX lens:
Sample photos
Full-resolution photos at Impress and Kenko Tokina, shot with the Canon 5D Mark II camera.
Accessories and add-ons
The Tokina 17-35 f4 PRO FX takes 82mm filters. Recommended filter brands are B+W and Hoya.
Resources
Official Tokina 17-35mm f/4 AT-X PRO FX page at Tokina Japan and THK Photo Products.
Related
Tokina Lenses – Main page
Canon Lenses – Main page
Nikon Lenses – Main page