Sigma Cine 27mm T1.3 LF Aizu Prime Line

Brilliant at T1.3: Forging new expressions.
Here begins a new benchmark for filmmaking.

Introducing the Aizu Prime Line―the world’s first lineup* of large-format cinema lenses to achieve an aperture value of T1.3 across all focal lengths.

The lineup combines modern sharpness with an organic and naturally soft look, bringing rich texture and depth to visuals.

*As of June 2025, by Sigma.

Boasting unparalleled brightness, refined expression, and reliable performance.

The Aizu Prime Line embodies the proven technology and quality of “Made in Aizu, Japan” establishing the new standard.

The lineup of 12 lenses features a consistent T1.3 aperture across the full range from 18mm to 125mm. The initial release includes 8 lenses with focal lengths from 25mm to 75mm, covering core cinematic production needs.

Filmed by Kanamé Onoyama

About Love

Director Interview

Love is a universal theme, yet it takes countless forms. In this project, I aimed to capture its essence through a sequence of short, emotionally impactful scenes within a five-minute film. This was more than just a lens performance test—it was an exploration of how the lens would resonate with human emotions. Love is complex. It can be passionate, familial, platonic, unfulfilled, or even transform into hatred or jealousy. This film weaved together these different facets, challenging the Sigma Aizu Prime Line to capture the subtlest nuances of human emotion.

This project was to balance cinematic beauty with the realism of improvised performances. The primary shooting style was handheld, with other styles selectively used where needed. Having the Sony Venice 2 as a main camera, for travel sequences, the Sony FX3 allowed for spontaneous filming without special permits, making full use of natural light and ambient sound for immersive storytelling.
The crew was kept to a taxi-sized team, with additional assistants or technicians brought in only for larger equipment needs. This approach ensured efficiency while capturing a wide variety of locations and subjects in a short time.

Features

• A consistent T1.3 across all focal lengthsThe T1.3 aperture enables exceptionally shallow depth of field and graceful bokeh, seamlessly separating the subject while preserving a natural sense of depth and dimensionality. This refined visual language draws the viewer into the frame with a subtle yet powerful presence.
• Optical design for the demands of cinemaAll lenses in the Aizu Prime lineup feature an optical system developed exclusively for cinema applications. While maintaining modern sharpness, they avoid rigid or harsh depictions—delivering a natural, organic look. They provide quiet elegance and depth to the image, with distortion and focus breathing carefully minimized to ensure visual consistency, even in dynamic scenes.
• Huge perspective range coverageThe Aizu Prime Line is designed as a system to cover a wide range of focal lengths from 18mm to 125mm. Initially 8 core lenses ranging from 25mm to 75mm are being released, followed by 18mm and 21mm wide-angle lenses, and 100mm and 125mm telephoto lenses. This comprehensive system, covering from ultra-wide-angle to telephoto, is adaptable to diverse scenes and compositions, and supports a wide array of visual expressions.
• Completely consistent lookConsistency of color balance, contrast, and flare characteristics ensures seamless integration between scenes, bringing a high level of harmony to the entire visual narrative across the entire lineup from 18mm to 125mm.
• φ46.3mm image circleThe large φ46.3mm image circle ensures full coverage not only for full-frame and Super35 formats, but also for the latest large-format cameras such as the ARRI ALEXA LF Open Gate and VistaVision. This capability enables uncompromised filmmaking across a diverse range of projects.
• High-impact close-up expressionThe short minimum focusing distance enables striking close-up shots. By getting closer to the subject, the Aizu Prime lenses create visual tension and dramatic effects, adding depth to the imagery.
• A Compact design that unleashes creativityDespite being built for large-format coverage and featuring an ultra-fast T1.3 aperture, the Aizu Prime lenses remain remarkably lightweight. This rare balance of exceptional speed and mobility offers the flexibility and creative freedom demanded by modern productions—from dolly and Steadicam to gimbal and handheld operation.
• Precise operation and durabilityThe Aizu Prime lenses offer precise control, exceptional durability, and ease of maintenance. Despite its compact housing, it delivers unwavering reliability in demanding shooting environments. Every mechanical detail—from the wide focus rotation angle to the equal-pitch aperture ring—embodies the engineering expertise cultivated through the Sigma High Speed Prime series.
• Compatible with the Cooke /i + ZEISS eXtended DataThe Aizu Prime lenses are compatible with Cooke /i + ZEISS eXtended Data, offering real-time lens metadata during shooting. It also enables the export of distortion and shading correction data, streamlining workflows for VFX productions.
• Compatible Accessories 

  MOUNT CONVERTER MC-31

  Sigma MOUNT CONVERTER MC-31 allows PL mount lenses to be used on L-Mount cameras.

*1 Close focus distance is measured from the image plane
*2 Front to mount flange
*3 Without lens support foot
*4 Horizontal angle of view for ARRI LF Open Gate mode aperture (aspect ratio 3:2, dimensions 36.70mm × 25.54 mm)
*5 Horizontal angle of view for a full-frame cinema camera aperture (aspect ratio 1.5:1, dimensions 36 mm × 24 mm)
*6 Horizontal angle of view for a Super 35 cinema camera aperture (aspect ratio 1.33:1, dimensions 24.9 mm × 18.7 mm)

Download Specifications