The 12mm T3.1 VDSLR Cine Fisheye for Canon EF mount by Samyang is a lens optimized for digital cinematography and, as such, offers a manual de-clicked aperture for smooth and silent adjustment and unified focus and aperture gears for use with follow focus accessories. Additionally, the focus, aperture, and depth of field markings are on the side of the lens to assist focus pullers who typically operate on the side of the camera. The aperture is measured in absolute T-stops to provide precise and consistent exposure across lenses, and the color reproduction is matched with other Samyang cine lenses for consistency.
This fisheye lens provides a 180º diagonal angle of view on full-frame cameras for an ultra-wide, distorted perspective that is useful for creative interiors, landscapes, and experimentation in many applications. The maximum T3.1 aperture is effective in low-light situations.
The lens's optical design consists of 12 lens elements arranged in 8 groups, including three elements made of low ED dispersion glass and two aspherical lens elements to minimize coma and chromatic aberrations. The highly effective nano crystal anti-reflective coating (NCS) applied along with UMC coatings enhances light transmission and reduces ghosting. Its internal focus system does not extend the front elements during focusing and minimizes lens breathing effects.