AIZU PRIME25mm T1.3 LF
- A consistent T1.3 across all focal lengths
- Optical design for the demands of cinema
- Huge perspective range coverage
- Completely consistent look
- ⌀46.3mm image circle
- High-impact close-up expression
- A compact design that unleashes creativity
- Precise operation and durability
- Compatible with the Cooke / i + ZEISS eXtended Data
AWARDS
- CineD Best of Show Award - Cine Gear LA Expo 2025
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.
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.
*As of June 2025, by Sigma.
ABOUT LOVE
Filmed by Kanamé Onoyama
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. Depending on the scene, we shot on various full-frame format cameras for a classic cinematic look. The Sony Venice 2 was utilized as the 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.
Director DP: Kanamé Onoyama
Editor: Julie Gaufreteau
Editor: Vincent Fleischmann
Editing House: Everest
Studio Mastering: 42
*As of June 2025, by Sigma.
Sony E-mount: 159mm / 6.3
Sony E-mount: 1.7 kg / 3.7 lbs.
Compatible with the Cooke /i + ZEISS eXtended Data output (via /i Technology-compatible lens mount or 4 -pin LEMO connector)
Sony E-mount:
Compatible with Sony E-mount communication protocol. Enables transmission and recording of lens metadata to supported camera bodies.
*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 x 25.54mm / 1.445"x 1.006")
*5 Horizontal angle of view for a full-frame cinema camera aperture (aspect ratio 1.5:1, dimensions 36mm x 24mm / 1.42"x 0.94")
*6 Horizontal angle of view for an Super 35 cinema camera aperture (aspect ratio 1.33:1, dimensions 24.9mm x 18.7mm / 0.98"x 0.74")
Sony E-Mount: 1.7kg / 3.7 lb.
A consistent T1.3 across all focal lengths
The 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 cinema
All 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 coverage
The 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 look
Consistency 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.
⌀46.3mm image circle
The large ⌀46.3mm image circle ensures full coverage not only for full-frame and Super 35 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 expression
The 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 impactful depth to the imagery.
A compact design that unleashes creativity
Despite 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 durability
The 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 Data
The 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.
