Samyang 12mm T3.1 Cine Fisheye Lens for Pentax K
The Samyang 12mm T3.1 is a 12mm f/3.1 lens designed for Pentax K mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Samyang 12mm T3.1 Cine Fisheye Lens for Pentax K
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Lens Overview — Samyang 12mm T3.1
Key Features — Samyang 12mm T3.1
12mm Fisheye Prime: Fixed 12mm focal length delivers a wide, immersive fisheye perspective suited to creative and environmental cinematography.
T3.1 Maximum Aperture: T-stop rating reflects actual light transmission rather than a theoretical f-stop, making exposure matching reliable across multi-lens cine productions.
APS-C / Full-Frame Coverage: Designed to cover a full-frame image circle, suitable for Pentax K-mount cameras including both APS-C and full-frame bodies.
Manual Focus Design: Dedicated manual focus ring built for smooth, repeatable focus pulls in professional cinema and video workflows.
Pentax K Mount: Natively mounts to Pentax K system cameras without adapters, maintaining a direct and stable optical connection.
Cine-Optimized Build: Designed specifically for video and film use, with focus markings and mechanics suited to on-set production environments.
Lens Specifications — Samyang 12mm T3.1
| 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 | Cinema / Video |
| Lens Mount | Pentax K |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 525g |
Description — Samyang 12mm T3.1
The Samyang 12mm T3.1 Cine Fisheye Lens for Pentax K is a manual focus prime lens designed for cinema and video use, covering a full-frame image circle on Pentax K mount cameras. With a fixed 12mm focal length in the wide angle fisheye category, it provides a dramatic, all-encompassing field of view well suited to creative filmmaking, immersive environments, and unconventional perspectives. The aperture is rated at T3.1 — a true T-stop measurement that quantifies actual light transmission, making it the preferred rating system when color-matching and exposure consistency matter across a cine lens set.
Weighing in at 525g, the lens is substantial enough to feel professional without being unwieldy on a rig. There is no autofocus and no image stabilization, both of which are standard for a dedicated cine lens where manual control and external stabilization support are assumed. For Pentax K mount cinematographers looking for a fisheye cine prime, this Samyang offering delivers a purpose-built, spec-consistent option.
Pros — Samyang 12mm T3.1
- ✓T3.1 maximum aperture provides a light-transmission-accurate rating ideal for multi-lens cine productions requiring consistent exposure
- ✓Fixed 12mm focal length delivers a wide fisheye perspective suited to creative and environmental cinematography
- ✓Full-frame lens format ensures broad sensor coverage on compatible Pentax K mount cameras
Cons — Samyang 12mm T3.1
- ✗No autofocus — fully manual operation may not suit photographers accustomed to AF-driven still shooting
- ✗No image stabilization, requiring additional support for steady handheld footage
- ✗No filter thread listed, which may limit the use of standard screw-on optical filters
Videos — Samyang 12mm T3.1
Samyang 12mm f/2.8 ED AS NCS 'Fisheye' lens review (with samples) — Christopher Frost