Samyang VDSLR II 12mm T3.1 Ultra Wide Cine Fisheye Lens for Canon EOS EF&nbsp;DSLR Cameras - Full Frame Compatible Full Frame Sensor Coverage with aperture range of T3.1 - T22 Dual calibrated right and left side distance an T-stop scales Produces an Extreme Ultra-Wide 180 Degree Diagonal Fisheye View De-Clicked (Uncoupled) and Geared Aperture and Focus Rings with Unified VDSLR II Lens System focus gear and aperture gear positions Includes removable petal shaped lens hood, lens caps, lens pouch, instruction manual and 1 year Samyang USA warranty