Samyang 8mm T3.1 UMC Fish-eye CS II is a sophisticated wide-angle fisheye lens designed for cameras with APS-C sensor. VDSLR Samyang lenses are fitted with racks compatible with the Follow Focus system. This solution allows for effortless and accurate rotation of focus and aperture rings. The aperture ring is rotated smoothly and noiselessly. These modifications allow for extremely comfortable and effective control of focal plane and depth of field during filming.

Its optics comprise of 11 lens elements arranged in 8 groups. The product's optical parameters are extremely high, thanks to the two aspherical elements, three ED element with very low dispersion factor and multi-layered anti-reflection UMC coatings. The lens provides a diagonal field of view equal to 180 degrees, while the minimum focusing distance is only 0.3 meters. The lens is fitted with a non-removable lens hood. Brightness of the lens corresponds with the T-number of 3.1. To facilitate the reading on the focus and aperture scale, both these indexes are marked in a parallel position to the optical axis of the lens.