12mm T3.1

FULL FRAME FISHEYE

  • Internal Focus
  • Low CA
  • Low Flare & Ghost
  • Low Coma
  • Fisheye Perspective
  • Nano Coating System

User manual can be downloaded here: Download

The 12mm T3.1 ED AS IF NCS UMC Cine DS Fisheye Lens from Rokinon is a lens optimized for digital cinematography and as such provides a de-clicked manual aperture for smooth and silent adjustment and unified focus and aperture gears for use with follow focus accessories. Also, focus, aperture, and depth of field markings are on the side of the lens to aid focus pullers who typically operate on the side of the camera. Aperture is measured in absolute T-stops to provide accurate and consistent exposure across lenses and color rendition is matched with other Rokinon cine lenses for consistency.

This fisheye lens provides a 180º diagonal angle of view on full-frame cameras for an ultra-wide angle, distorted perspective that is useful for architectural interiors, landscapes and creative experimentation in any application. The T3.1 maximum aperture is effective in low light situations and enables some measure of shallow depth of field control. 

The lens' optical design consists of 12 lens elements arranged in 8 groups including three elements made of low dispersion ED glass and two aspherical lens elements to minimize coma and chromatic aberrations. Highly effective nano crystal anti-reflection (NCS) coating applied together with UMC coatings improve light transmission and reduce ghosting. Its internal focus system does not extend the front elements during focus and minimizes the effects of lens breathing.

  • This Canon EF Mount manual focus lens optimized for digital cinema provides a de-clicked manual aperture for smooth and silent adjustment and unified focus and aperture gears for use with a traditional follow focus. Also, focus, aperture, and depth of field markings are on the side of the lens to aid focus pullers who typically operate on the side of the camera. Aperture is measured in absolute T-stops to provide accurate and consistent exposure across lenses and color rendition is matched with other Rokinon cine lenses for consistency.
  • An ultra wide-angle fisheye lens with a 12mm focal length on full-frame cameras and an 19.2mm equivalency when used on APS-C and Super 35mm format cameras. Its distorted perspective is useful for interiors, landscapes, group shots and many creative wide-angle applications.
  • Extra low dispersion and aspherical lens elements reduce aberrations for sharp, color-accurate imaging.
  • Nano crystal coating and ultra multi-coating on the lens elements improves light transmission and reduces ghosting and flare.
  • Sturdy metal barrel with removable petal-shaped lens hood.

Canon

Model: DS12M-C
MSRP: $699
UPC: 0-84438-76373-7
Focal Length: 12mm
Maximum Aperture: T3.1
Coverage: Full Frame (FX)
Optical Construction: 12 Glass Elements In 8 Groups
Aperture Range: T3.1 to T22
Diaphragm Blades: 7
Coating: Nano Coating System
Minimum Focusing Distance: 7.9”(0.20m)
Filter Size: n/a
Lens Hood: Removable Petal Shaped
Maximum Diameter: 3.21”(81.6mm)
Weight: 18.52oz (525g)
Length: 2.86” (72.7mm)
1. Rokinon MTF charts use theoretical equations to plot performance and do not rely on subjective 
opinion, subject matter, camera features, software or other factors. They plot the contrast and resolution of a lens from the center to its edges, against a "perfect" lens that would transmit 100% of the light that passes through it. The contrast of a lens is important because it directly relates to resolution.

3. Rokinon tests are carried out with the lens at its maximum (widest) aperture (Ex. 24mm F1.4 lens is measured at F1.4 for MTF).

4. Zero on the chart’s X-axis (horizontal axis) 
represents the center of the lens. As a line moves right, it indicates the change of contrast and sharpness from the center to the edge of the image. 

5. The Y-axis (vertical axis) plots the transmission of light through the lens. It has a maximum value of "1.0" to indicate 100% transmittance of the light, which is not possible to achieve. 

6. The blue graph lines (10 lines/mm) represent contrast measurement. The red graph lines (30 lines/mm) represent resolution.

7. Sagittal lines (thick lines) represent the contrast 
measurements of line pairs that are parallel to an imaginary diagonal line that runs from the bottom left hand corner to the top right hand corner of a image frame. Meridonial lines (thin lines) represent line pairs that are perpendicular to the imaginary diagonal line.

8. The higher and straighter the blue lines, the better the contrast. The higher and straighter the red lines, the better the resolution.