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ARRI Signature Prime 18mm T1.8 Cinema Lens

The ARRI 18mm T1.8 is a 18mm f/1.8 cinema lens designed for PL Mount, LPL mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

ARRI Signature Prime 18mm T1.8 Cinema Lens

ARRI Signature Prime 18mm T1.8 Cinema Lens

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Lens Overview — ARRI 18mm T1.8

The ARRI Signature Prime 18mm is a wide-angle cinema lens designed for professional cinematography applications. Built on the PL Mount, it integrates seamlessly into high-end cinema camera setups that rely on this industry-standard lens interface. With a maximum aperture of T1.8, this prime lens offers strong light-gathering capability, making it a practical choice for challenging lighting environments and for achieving shallow depth of field in narrative or commercial production.

The lens covers a Full Frame image circle, giving cinematographers the coverage they need for modern large-sensor cinema cameras. As a prime lens with a fixed 18mm focal length, it delivers the consistency and optical commitment that many directors of photography prefer for wide-angle work. Focus is fully manual, which is standard practice in professional cinema workflows where precision and repeatability are prioritized over autofocus convenience.

The lens weighs 2kg, a figure worth considering when planning rig builds, gimbal setups, or extended handheld operation. No image stabilization is present, consistent with a lens intended for controlled production environments. Overall, the Signature Prime 18mm is a purpose-built tool for the demands of professional cinematography at the wide end of a prime set.

Key Features — ARRI 18mm T1.8

LPL & PL Mount: Supplied with both LPL and PL mount versions; PL ensures broad compatibility with professional cinema systems from ARRI, RED, Sony, and others.

T1.8 Maximum Aperture: Fast light-gathering capability supports shooting in low-light environments and achieving shallow depth of field.

18mm Fixed Focal Length: Wide-angle prime perspective delivers a consistent field of view with no optical compromises from a zoom design.

Large Format Coverage: Image circle covers full-frame large-format sensors including the ARRI ALEXA LF and Mini LF, going beyond Super 35.

Manual Focus Design: Smooth, precise focus ring is built for repeatable focus pulls in professional cinema workflows.

Matched Set Consistency: Part of the Signature Prime set, designed to match color, contrast, and bokeh characteristics across the full focal length range.

Lens Specifications — ARRI 18mm T1.8

ARRI 18mm T1.8 full specifications
SpecDetail
Use CasesVideo / Cinematography
Lens TypeCine
FormatFull Frame
Zoom/PrimePrime
Focal Length18mm
Maximum Aperturef/1.8
Camera SystemCinema / Video
Lens MountPL Mount, LPL
AutofocusNo
Focus TypeManual
Image StabilizationNone
Weight2kg

Description — ARRI 18mm T1.8

The ARRI Signature Prime 18mm is a Wide Angle Prime cinema lens built for professional production environments. Mounted via the industry-standard PL Mount, it connects to a wide range of high-end cinema camera systems. The lens delivers a fixed 18mm focal length and a maximum aperture of T1.8, providing solid low-light performance and the ability to achieve shallow depth of field in controlled cinematography contexts.

Its Full Frame coverage makes it suitable for large-sensor cinema cameras that demand broad image circle support. Focus is entirely manual, reflecting the professional cinema standard where dedicated focus pullers work with follow focus systems for precise, repeatable results. The lens weighs 2kg, a figure that should factor into any rig, gimbal, or crane configuration. No image stabilization is built in, placing all motion control responsibilities on the camera support system.

With no listed filter thread size, cinematographers planning to use front-mounted filtration should verify compatibility with step-up rings or matte box solutions. The Signature Prime 18mm is designed specifically for the Cinema / Video camera system category, making it a purpose-built tool rather than an adapted photography lens.

Pros — ARRI 18mm T1.8

  • ✓Fast T1.8 maximum aperture enables strong light-gathering performance in demanding shooting conditions
  • ✓Full Frame lens format provides broad image circle coverage for large-sensor cinema cameras
  • ✓PL Mount compatibility ensures integration with a wide range of professional cinema camera bodies

Cons — ARRI 18mm T1.8

  • ✗At 2kg, the lens weight demands careful consideration for gimbal and handheld rig configurations
  • ✗No image stabilization, so all camera movement control relies on rigging or the camera platform
  • ✗Manual focus only — no autofocus capability for run-and-gun or documentary-style spontaneous shooting

Videos — ARRI 18mm T1.8

ZEISS Supreme Prime / ARRI Signature Prime Comparison Lens Test — 2.39 Rental

Resources & Downloads — ARRI 18mm T1.8

Manuals & Guides

Frequently Asked Questions — ARRI 18mm T1.8

What camera mount does the ARRI Signature Prime 18mm use?+
The lens uses a PL Mount, which is the standard mount for professional cinema cameras. This makes it compatible with cinema-focused camera systems that accept PL Mount lenses.
Does this lens cover Full Frame sensors?+
Yes, the ARRI Signature Prime 18mm has a Full Frame lens format, meaning it is designed to cover Full Frame image sensors used in modern cinema cameras.
What is the maximum aperture of this lens?+
The maximum aperture is T1.8. This T-stop rating reflects the actual light transmission of the lens, which is the standard measurement used in professional cinema lens evaluation.
Does the lens have autofocus or image stabilization?+
No. The lens is manual focus only and has no image stabilization. This is consistent with standard professional cinema lens design, where focus is handled by dedicated focus pullers using follow focus systems.
How much does this lens weigh?+
The ARRI Signature Prime 18mm weighs 2kg. This is an important consideration when planning rig builds, especially for gimbal or extended handheld use where balance and fatigue are factors.
Is this lens a zoom or a prime?+
It is a prime lens with a fixed focal length of 18mm, categorized as a wide-angle lens. Prime lenses are favored in cinema for their optical consistency and the discipline they bring to the framing process.

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