Rokinon 12mm T3.1 Cine DS Fisheye Lens for Canon EF
The Rokinon 12mm T3.1 Fisheye is a 12mm f/3.1 lens designed for Canon EF mount cameras. Used copies start from $256.36 on GearFocus, with buyer protection on every purchase.
Rokinon 12mm T3.1 Cine DS Fisheye Lens for Canon EF
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Lens Overview — Rokinon 12mm T3.1 Fisheye
Key Features — Rokinon 12mm T3.1 Fisheye
12mm Fisheye Prime: Fixed 12mm focal length delivers the characteristic wide, barrel-distorted perspective of a fisheye on Canon EF-mount DSLR bodies.
T3.1 Maximum Aperture: Rated in true T-stops rather than f-stops, ensuring consistent light transmission for matched exposures when cutting between lenses on a shoot.
De-Clicked Aperture Ring: Stepless, silent aperture adjustments allow smooth exposure changes during a take without producing noise on the audio track.
Canon EF Mount: Fits Canon EF-mount DSLR bodies, covering both full-frame and APS-C sensors.
Integrated Gear Rings: Built-in focus and aperture gear rings provide direct compatibility with standard follow focus systems and lens control rigs.
Side-Positioned Markings: Focus and aperture scales are printed on the side of the barrel, positioned for easy reading by a focus puller operating beside the camera.
Lens Specifications — Rokinon 12mm T3.1 Fisheye
| Spec | Detail |
|---|---|
| Use Cases | Video / Cinematography, Creative Effects |
| Lens Type | Fisheye |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 12mm |
| Maximum Aperture | f/3.1 |
| Camera System | DSLR |
| Lens Mount | Canon EF |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 525g |
Description — Rokinon 12mm T3.1 Fisheye
The Rokinon 12mm T3.1 Cine DS Fisheye Lens for Canon EF is a prime, full-frame fisheye lens built for Canon EF-mount DSLR systems. With a fixed 12mm focal length and an ultra wide-angle fisheye classification, it produces the broad, curved perspective characteristic of fisheye optics. The maximum aperture is rated at T3.1, a true T-stop value that guarantees consistent light transmission — an important factor when working with multiple lenses on a production.
The de-clicked aperture design allows seamless, quiet adjustments during a take, while the integrated gear rings on both the focus and aperture barrels make it directly compatible with industry-standard follow focus systems. All markings for focus and aperture are positioned on the side of the barrel for easy reading. The lens is manual focus only, with no autofocus and no image stabilization, placing all control with the operator.
It is optimized for full-frame coverage on the Canon EF mount and weighs 525g, balancing capability with portability on a working rig.
Pros — Rokinon 12mm T3.1 Fisheye
- ✓T3.1 maximum aperture uses true T-stop measurement for consistent, matched exposures across lenses
- ✓Fixed 12mm focal length on a full-frame lens delivers an ultra wide-angle fisheye perspective
- ✓De-clicked aperture ring enables smooth, silent aperture pulls suited to video work
Cons — Rokinon 12mm T3.1 Fisheye
- ✗Manual focus only — no autofocus support, which may limit use in fast-moving stills situations
- ✗No image stabilization, requiring stable support for shake-free footage
- ✗No filter thread size listed in specifications, making front-element filtration uncertain
Videos — Rokinon 12mm T3.1 Fisheye
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Frequently Asked Questions — Rokinon 12mm T3.1 Fisheye
Does this lens support autofocus?+
No. The Rokinon 12mm T3.1 Cine DS has manual focus only, with no autofocus capability. This is consistent with its cine-oriented design, where precise manual control via follow focus systems is preferred over autofocus.
What camera mount does this lens use?+
This lens is built for Canon EF mount. It is designed for DSLR camera systems and covers a full-frame image circle, making it compatible with full-frame and crop-sensor Canon EF-mount bodies.
Is the aperture in this lens measured in f-stops or T-stops?+
The maximum aperture is rated at T3.1, which is a T-stop — a measurement of actual light transmission rather than a geometric f-stop calculation. T-stops are standard in cinema lenses because they ensure consistent exposures when cutting between lenses.
Does the lens have image stabilization?+
No. According to the specifications, image stabilization is listed as None. Users should plan to use a stable support system or in-body stabilization if their camera offers it.
How heavy is this lens?+
The lens weighs 525g. This makes it manageable for most camera rigs, shoulder mounts, and gimbal setups.
Can I attach filters to this lens?+
The filter thread size is not listed in the available specifications for this lens. Buyers who require front-element filtration should verify compatibility through other sources before purchasing.