" http://www.amazon.com/gp/product/B007R8U59E?tag=httpblogtrave-20
8mm Ultra wide cine fisheye lens with 180 degrees angle of view
Feature declicked aperture for easy video shooting
Constructed of 10 elements in 7 groups features built-in petal type hood
Works best with Canon APS-C image sensors
Seamless Aperature shifting from T38-T22
Rokinon RK8MV-C 8mm T3.8 Cine Fisheye Lens for Canon Video DSLR with Declicked Aperture"