The 50mm Aizu Prime delivers a timeless, neutral perspective that has anchored cinematography for decades. Neither wide nor telephoto, it offers a natural sense of scale and subject separation—now enhanced by a remarkably fast T1.3 aperture that adds expressive depth, low-light flexibility, and refined control over focus falloff.
Sigma’s Aizu Prime series redefines practicality in cinema optics. As the world’s first large-format cine lens lineup to achieve a consistent T1.3 aperture across all focal lengths, Aizu Primes offer unmatched versatility and creative freedom. Designed exclusively for cinema and manufactured in Sigma’s state-of-the-art Aizu facility in Japan, these lenses deliver a beautifully balanced image—combining modern sharpness with a smooth, organic character.
With compact, lightweight housings, extended data support, luminous engraved markings, and excellent close-focus performance, Aizu Primes are built for the demands of modern productions. Focus breathing is carefully suppressed, distortion is minimal, and performance remains consistent from 18mm to 125mm—setting a new standard for high-end cinematography.
Focal Length | 50mm |
Max Aperture | T1.3 |
Format | Full Frame / Vista Vision |
Image Circle* | Ø46.3mm* |
Lens Mount | PL, E |
Min. Focus | 1'7" / 0.48m |
Front Dia. | 95mm |
Filter Thread | none |
Iris Blades | 13 |
Optical Layout | |
Body Material | Anodized Aluminum |
Data Protocol | Cooke /i & Zeiss eXtended Data |
Length | 5" / 126.3mm |
Weight | 3.7 lbs. / 1.7 kg |
- Sigma 50mm T1.3 Aizu Prime Lens
- Front/Rear Caps
- Support foot