Tamron SP Di II 10-24mm F3.5-4.5 AF Zoom Lens - Nikon Mount for EOS DSLR's. The Tamron SP AF10-24mm f/3.5 -4.5 Di II is an ultra wide-angle zoom lens. Boasting a focal length range of 10 - 24mm, (the 35mm equivalent of 16mm to 37mm) this lens has a varied range of applications for creating dramatic images as it features both ultra-wide and semi-wide angle settings.