ARRI Signature Prime 40mm T1.8 Cinema Lens
The ARRI 40mm T1.8 is a 40mm f/1.8 cinema lens designed for LPL, PL Mount mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

ARRI Signature Prime 40mm T1.8 Cinema Lens
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Lens Overview — ARRI 40mm T1.8
Key Features — ARRI 40mm T1.8
LPL / PL Mount Interface: Ships with PL mount; the ARRI Signature Prime series also supports LPL mount, ensuring compatibility across professional cinema camera platforms.
T1.8 Maximum Aperture: Wide maximum aperture allows for shallow depth of field and effective performance in low-light cinematography conditions.
Large-Format Coverage: Image circle designed for ARRI Large Format sensors (ALEXA LF, ALEXA Mini LF), covering sensors larger than traditional Super 35.
40mm Fixed Focal Length: Standard focal length offers a natural field of view well suited to dialogue scenes, close-ups, and general narrative work.
Manual Focus Design: Smooth, precise focus ring is built for repeatable focus pulls by a dedicated focus puller on professional cinema sets.
Consistent Front Diameter: Signature Primes share a uniform 95mm front diameter across the set, allowing accessories and matte boxes to remain unchanged between lenses.
Lens Specifications — ARRI 40mm T1.8
| Spec | Detail |
|---|---|
| Use Cases | Video / Cinematography |
| Lens Type | Cine |
| Format | Full Frame |
| Zoom/Prime | Prime |
| Focal Length | 40mm |
| Maximum Aperture | f/1.8 |
| Camera System | Cinema / Video |
| Lens Mount | LPL, PL Mount |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 1.9kg |
Description — ARRI 40mm T1.8
The ARRI Signature Prime 40mm T1.8 is a dedicated cinema prime lens built for professional motion picture production. It features a PL Mount, the industry-standard cinema lens interface, and is designed to cover a Full Frame image format. With a maximum aperture of T1.8, this lens performs in demanding lighting conditions and allows cinematographers to work with a shallow depth of field when needed.
Focus is manual only, in keeping with professional cinema workflows where a focus puller handles lens operation. The lens falls within the standard focal length range at a fixed 40mm, making it a versatile option for narrative filmmaking, documentary work, and commercial production. Weighing 1.9 kg, it is a substantial but workable lens for handheld and rigged setups alike.
Image stabilization is not included, so on-set support systems are essential. This lens is purpose-built for the Cinema / Video camera system ecosystem, reinforcing its role as a professional production tool.
Pros — ARRI 40mm T1.8
- ✓Wide maximum aperture of T1.8 supports low-light shooting and shallow depth of field
- ✓Full Frame lens format provides coverage for large-format sensor cameras
- ✓PL Mount is a widely adopted industry-standard cinema mount
Cons — ARRI 40mm T1.8
- ✗No image stabilization — production must rely on external support rigs
- ✗No autofocus capability, which limits solo-operator run-and-gun workflows
- ✗No filter thread size specified, which may complicate on-set filtration planning
Videos — ARRI 40mm T1.8
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