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Sirui 55mm T1.2 Cine Lens

The Sirui 55mm T1.2 RF is a 55mm f/1.2 lens designed for Sony E mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Sirui 55mm T1.2 Cine Lens

Sirui 55mm T1.2 Cine Lens

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Lens Overview — Sirui 55mm T1.2 RF

The Sirui 55mm T1.2 Cine Lens is a manual-focus prime lens designed for APS-C and Super35 sensor mirrorless cameras, built around a Sony E mount. With a fast T1.2 maximum aperture, this lens is well-suited for shooting in low-light conditions while also providing shallow depth-of-field control that cinematographers and videographers look for in a dedicated cine-style optic. At 55mm on an APS-C sensor, it sits in the standard focal length range, making it a versatile choice for a wide variety of shooting scenarios including narrative work, documentary, and run-and-gun video production.

The lens is fully manual focus, consistent with cine lens workflow expectations, and carries no image stabilization — something to keep in mind when selecting a support rig or stabilizer. Weighing in at 587g, it strikes a reasonable balance between build substance and portability for a T1.2 prime. The 67mm filter thread accommodates common matte boxes and screw-on filters without requiring step-up rings in most configurations.

Overall, this lens targets Sony E mount mirrorless shooters who want cine lens ergonomics and a fast aperture in a standard focal length.

Key Features — Sirui 55mm T1.2 RF

T1.2 Maximum Aperture: Exceptionally fast aperture allows shooting in low-light environments while delivering shallow depth of field for cinematic subject separation.

55mm APS-C Prime: Standard focal length on APS-C and Super35 sensors produces a natural perspective well-suited to narrative, documentary, and run-and-gun video work.

Cine-Style Manual Focus: Dedicated manual focus ring with smooth, damped action is designed for precise, repeatable focus pulls in professional video workflows.

Sony E Mount: Compatible with a wide range of Sony and third-party APS-C and full-frame mirrorless camera bodies using the E mount system.

67mm Filter Thread: Common 67mm front thread accepts a wide range of screw-on filters and integrates with most matte box systems without step-up rings.

587g Build Weight: Substantial enough to feel well-built, yet light enough to remain practical for gimbal-mounted and handheld shooting setups.

Lens Specifications — Sirui 55mm T1.2 RF

Sirui 55mm T1.2 RF full specifications
SpecDetail
Use CasesStudio, Video / Cinematography
Lens TypeCine
FormatSuper 35
Zoom/PrimePrime
Focal Length55mm
Maximum Aperturef/1.2
Camera SystemMirrorless
Lens MountSony E
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread67mm

Description — Sirui 55mm T1.2 RF

The Sirui 55mm T1.2 Cine Lens is a manual focus prime built for Sony E mount mirrorless cameras with APS-C format sensors. Its T1.2 maximum aperture gives cinematographers strong low-light performance and meaningful depth-of-field control in a standard 55mm focal length — a range well suited to everything from interview work to narrative filmmaking. As a dedicated cine-type lens with manual focus only, it fits naturally into video-focused workflows where precise, repeatable focus pulls are the norm.

The lens weighs 587g, offering a solid feel without excessive heft for handheld or gimbal-mounted shooting. A 67mm filter thread makes it straightforward to attach common ND filters, polarizers, or matte box adapters. With no image stabilization, shooters will want to pair this lens with a stabilized platform or a camera body offering in-body stabilization for the smoothest results.

Pros — Sirui 55mm T1.2 RF

  • ✓Fast T1.2 maximum aperture enables shooting in challenging low-light conditions
  • ✓55mm standard focal length on APS-C format (lensFormat: APS-C) offers versatile framing options
  • ✓Dedicated cine lens type with manual focus-only design suits professional video workflows

Cons — Sirui 55mm T1.2 RF

  • ✗No autofocus (autoFocus: false) — not suitable for stills shooters who rely on AF
  • ✗No image stabilization (imageStabilization: None) requires external stabilization for smooth handheld footage
  • ✗APS-C format coverage (lensFormat: APS-C) means it cannot cover full-frame sensors

Videos — Sirui 55mm T1.2 RF

Sirui Nightwalker vs 7artisans Vision Cine Lenses- BATTLE OF THE BUDGET — Jason Morris

Resources & Downloads — Sirui 55mm T1.2 RF

Manuals & Guides

Frequently Asked Questions — Sirui 55mm T1.2 RF

Does this lens work with full-frame Sony E mount cameras?+
The Sirui 55mm T1.2 has an APS-C image circle (lensFormat: APS-C), so it is designed for APS-C and Super35 sensor cameras. While it physically mounts on full-frame Sony E mount bodies, it is not intended to cover a full-frame sensor and vignetting should be expected outside APS-C crop mode.
Is this lens compatible with autofocus systems?+
No. The lens is manual focus only (autoFocus: false, focusType: Manual). It is designed as a cine lens for video workflows where manual focus control is standard practice.
What filter size does this lens use?+
The Sirui 55mm T1.2 uses a 67mm filter thread, which is a common size that works with a wide range of screw-on filters and matte box setups.
How heavy is this lens?+
The lens weighs 587g, making it a moderately weighted prime that should be manageable on most mirrorless rigs, gimbals, and shoulder mounts.
Does this lens include image stabilization?+
No, the lens has no built-in image stabilization (imageStabilization: None). Users who need stabilized footage should plan for in-body stabilization if their camera supports it, or use an external gimbal or stabilizer.
What camera mount does this lens use?+
This lens is built for the Sony E mount, making it compatible with Sony E mount mirrorless cameras. No other mount variants are specified in the product data.

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