Sigma Aizu Prime 27mm T1.3 LF

Natural Perspective Large Format Cine Lens

The Aizu Prime 27mm T1.3 LF expands Sigma’s next-generation large-format cinema lineup with a focal length designed to deliver an exceptionally natural and immersive cinematic perspective. As part of the Aizu Prime series, the lens maintains the lineup’s defining characteristic: a constant T1.3 aperture across all focal lengths, establishing a new benchmark for professional cinema production.

The 27mm focal length occupies a unique position within the cinema ecosystem, offering a slightly more natural field of view than a traditional 25mm while maintaining strong environmental context and cinematic spatial depth. This makes the lens highly versatile for handheld cinematography, dialogue scenes, moving camera shots, and immersive commercial work.

Optically, the lens combines modern high-resolution sharpness with an intentionally organic rendering profile. Images maintain exceptional detail while avoiding the overly clinical appearance often associated with digital cinema optics. Skin tones render naturally, highlights transition smoothly, and out-of-focus areas maintain a refined cinematic softness.

The extremely bright T1.3 aperture enables outstanding low-light capability while producing exceptionally shallow depth of field and powerful subject isolation. Focus breathing and distortion are carefully minimized to preserve compositional integrity during focus pulls and dynamic camera movement.

Mechanically, the Aizu Prime 27mm T1.3 LF features a robust all-metal housing engineered for professional production environments. The lens incorporates standardized cine gear placement, a 270° focus throw, and consistent front dimensions to ensure compatibility with professional cinema rigs and accessories.

Despite its advanced optical performance and large-format image coverage, the lens remains compact and lightweight, supporting modern handheld and gimbal workflows without compromise. Advanced metadata integration through Cooke /i Technology and ZEISS eXtended Data further enhances compatibility with modern VFX and virtual production pipelines.

Features – Aizu Prime 27mm T1.3 LF

• Constant ultra-fast T1.3 aperture
• Full-frame and large-format coverage
• Natural cinematic field of view
• Organic rendering with modern sharpness
• Exceptional low-light performance
• Controlled cinematic contrast
• Minimal focus breathing
• Reduced geometric distortion
• Smooth highlight transition rendering
• 46.3mm image circle
• Long 270° focus rotation
• Standardized cine mechanics
• Compact lightweight construction
• Full metal professional housing
• Cooke /i compatible
• Supports ZEISS eXtended Data
• Optimized for handheld and gimbal use
• Designed for high-end cinema workflows

Mounts

• PL Mount
• Sony E-Mount

Technical Specifications

• Lens type: Large Format Cinema Prime Lens
• Focal length: 27mm
• Aperture range: T1.3 – T22
• Image circle: 46.3mm
• Iris blades: 13-blade diaphragm
• Minimum focus distance: 0.33m / 1'1"
• Maximum magnification ratio: 1:6.9
• Front diameter: 95mm
• Focus rotation: 270°
• Iris rotation: 70°
• Gear standard: 0.8 MOD
• Metadata support: Cooke /i + ZEISS eXtended Data
• Lens support foot: SF-61
• Designed for large-format cinema production
• Compatible with professional cine accessories

Dimensions & Weight

• Length (PL Mount): 125.4mm / 5"
• Length (Sony E-Mount): 159.4mm / 6.3"
• Weight (PL Mount): 1.7kg / 3.6lb
• Weight (Sony E-Mount): 1.7kg / 3.8lb