The Sirui IronStar 135mm is a full-frame anamorphic cine lens with a T2.8 aperture and a 1.5x squeeze. Its horizontal field of view matches a 90mm lens on full frame – strong compression and clear separation of the subject from busy backgrounds. This blue flare version has a native PL mount and comes with an interchangeable EF mount module and tools. The filter…
The Sirui IronStar 135mm is a full-frame anamorphic cine lens with a T2.8 aperture and a 1.5x squeeze. Its horizontal field of view matches a 90mm lens on full frame – strong compression and clear separation of the subject from busy backgrounds. This blue flare version has a native PL mount and comes with an interchangeable EF mount module and tools. The filter thread is 92mm.
All IronStar focal lengths share the same look, colour rendering and gear positions. The 46mm image circle covers the full-frame sensor, so the widescreen image comes without vignetting or cropping.

Compared with a 1.33x squeeze, 1.5x gives a wider horizontal view, stronger background compression and more oval bokeh. A 3:2 sensor yields a 2.25:1 image, 16:9 recording a 2.66:1 widescreen frame.
The minimum focus distance lets you get close to faces and details.
Aperture from T2.8 to T16 for shallow depth of field even in low light.
Optics with 5 cylindrical elements.
With the PL mount and without cap; 1,110 g with the EF module.
Blue anamorphic flares give your shots a cinematic atmosphere – ideal for sci-fi, mystery and action scenes, car shots and urban settings. The series is also available with neutral flare.

The 46 mm image circle covers the entire 36 × 24 mm full-frame sensor of mirrorless and cinema cameras. The image is clean, with no vignetting and no need to crop.

The framing barely changes during focus pulls. The shot stays stable and consistent, as professional film production demands.

The lens has a native PL mount and comes with an EF mount module and dedicated tools, so you can match the mount to your camera. Back focus is fine-tuned with a rotating ring – no need to disassemble the mount or add shims. The PL mount can be set in four positions 90° apart, so the lens also works for vertical shooting.

The focus ring has a 270° throw for precise focus pulls. Gears sit in the same position on every lens in the series, so follow focus and accessories stay put when you swap lenses. Scales are marked in metres and feet.

Recommended for this lens:
Matte boxes for a 95 mm front – IronStar lenses have a 95 mm front diameter
| Manufacturer: | Sirui |
| Category: | Lenses |
| Filter thread | 92mm |
| Minimum Focusing Distance | 800mm |
| Number of aperture blades | 12 |
| Lens diameter | 95mm |
| Lens Length | 133mm |
| Lens mount | PL · EF |
| Lens color | Grey |
| Lens type | Cine prime lens |
| Lens suitable for | Full frame |
| Aperture (f) | 2.8 |
| Focal length | 135mm |
| Optical stabilisation | No |
| Auto focus | No |
| Zoom | No |
| Anamorphic | Yes |
| Anamorphic squeeze | 1.5× |
| Macro | No |
| Flare character | Blue |
| Weight | 1135g |
| Series | Sirui IronStar |
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