ARRI 21mm Master Lens
The ARRI 21mm T1.3 is a 21mm f/1.3 cinema lens designed for PL Mount mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
ARRI 21mm Master Lens
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Lens Overview — ARRI 21mm T1.3
Key Features — ARRI 21mm T1.3
T1.3 Maximum Aperture: One of the widest apertures available in a cinema prime, enabling low-light shooting and shallow depth of field even at 21mm.
21mm Wide-Angle Prime: Fixed focal length delivers a consistent, dedicated wide-angle perspective with no optical compromises introduced by a zoom mechanism.
PL Mount: Industry-standard cinema lens mount compatible with professional camera systems from ARRI, RED, Sony, and others.
Super 35 Coverage: Image circle is optimized for Super 35 sensors, the format used by many industry-standard digital cinema cameras.
Manual Focus Design: Smooth, precise focus ring engineered for use with follow-focus systems and repeatable focus pulls on professional sets.
Part of Master Prime Set: Designed as part of ARRI's Master Prime series, ensuring consistent color rendition, breathing characteristics, and front diameter across focal lengths.
Lens Specifications — ARRI 21mm T1.3
| Spec | Detail |
|---|---|
| Use Cases | Studio, Video / Cinematography |
| Lens Type | Cine |
| Format | Super 35 |
| Zoom/Prime | Prime |
| Focal Length | 21mm |
| Maximum Aperture | f/1.3 |
| Camera System | Cinema / Video |
| Lens Mount | PL Mount |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 2400g |
Description — ARRI 21mm T1.3
The ARRI 21mm Master Lens is a prime cinema lens built for professional Cinema / Video camera systems. It features a PL Mount, covering the Super 35 format and offering a T1.3 maximum aperture — a fast rating for a wide-angle prime that supports low-light shooting and shallow focus work. The lens is manual focus only, with no autofocus or image stabilization, consistent with how cinema primes are used in professional productions.
At 21mm, it provides a wide-angle field of view suited to establishing shots, environmental storytelling, or any scenario where broader coverage is needed. The lens weighs 2,400g, which should be factored into rig planning, particularly for operators using gimbals or shoulder-mounted setups where balance is critical. No filter thread size is listed in the specifications, so filtration solutions should be confirmed before production.
As a dedicated fixed focal length lens within the wide angle range, it is best deployed as part of a matched lens set to ensure consistent optical character across focal lengths on a production.
Pros — ARRI 21mm T1.3
- ✓Wide T1.3 maximum aperture enables shooting in low-light conditions and supports shallow depth of field at 21mm
- ✓PL Mount provides compatibility with a broad range of professional cinema cameras
- ✓Super 35 format coverage matches the sensor size of many industry-standard cinema cameras
Cons — ARRI 21mm T1.3
- ✗At 2,400g, the lens is substantial and may require careful consideration for gimbal or handheld rigging
- ✗No image stabilization, which is expected for a cinema prime but worth noting for handheld operators
- ✗No autofocus — operators relying on AF-assisted workflows will need to adapt
Videos — ARRI 21mm T1.3
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Frequently Asked Questions — ARRI 21mm T1.3
What camera mount does this lens use?+
The ARRI 21mm Master Lens uses a PL Mount, which is the industry-standard mount for professional cinema cameras. This makes it compatible with a wide range of cinema camera systems that accept PL-mount lenses.
What sensor format does this lens cover?+
The lens is designed to cover the Super 35 format. If you are using a camera with a larger sensor, you should verify coverage before shooting.
What is the maximum aperture of this lens?+
The maximum aperture is T1.3, which allows for strong performance in lower-light environments and the ability to achieve a shallow depth of field even at a wide 21mm focal length.
Does this lens support autofocus?+
No, this is a manual focus lens with no autofocus capability. This is standard for professional cinema lenses, where focus is typically controlled via a dedicated follow-focus system or focus puller.
How heavy is the ARRI 21mm Master Lens?+
The lens weighs 2,400g. This is a meaningful consideration when planning rigs, particularly for gimbal use or extended handheld shooting, where weight distribution and payload limits are important.
Does this lens have image stabilization?+
No, the specifications confirm that image stabilization is set to None. Stabilization for cinema work is typically handled at the rig level through gimbals, fluid heads, or other camera support systems.