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
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Lens Overview — Sirui 55mm T1.2 RF
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
| Spec | Detail |
|---|---|
| Use Cases | Studio, Video / Cinematography |
| Lens Type | Cine |
| Format | Super 35 |
| Zoom/Prime | Prime |
| Focal Length | 55mm |
| Maximum Aperture | f/1.2 |
| Camera System | Mirrorless |
| Lens Mount | Sony E |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
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





