Sigma Aizu arrives to set a new standard
Posted on Jun 4, 2025 by Adam Duckworth
The new prime line of fast, full-frame cinema glass with T1.3 apertures
Sigma has launched the Aizu Prime Line, a groundbreaking new series of large-format cinema lenses boasting fast T1.3 apertures across all focal lengths – a world-first in full-frame cine optics.
The full range is 12 lenses from 18mm to 125mm. Built from the ground up specifically for filmmaking, these are purpose-engineered cinema optics, designed to deliver rich texture, sharpness, and what Sigma describes as an “organic and naturally soft look.”
Eight lenses kick off the series
The initial rollout includes eight core lenses — 25mm, 27mm, 32mm, 35mm, 40mm, 50mm, 65mm, and 75mm — with consistent T1.3 maximum apertures. These will be followed by four additional focal lengths: 18mm, 21mm, 100mm, and 125mm. All lenses cover a 46.3mm image circle, making them fully compatible with full-frame and large-format systems such as Arri Alexa LF and VistaVision.
Each lens features a robust PL or Sony E-mount, a 95mm front diameter, and lengths between 125mm and 128.8mm. Weights range from 1.6kg to 1.7kg (PL mount). Despite their speed, the lenses remain compact and lightweight, ideal for handheld and gimbal use.
Designed for cinematic performance, the primes promise minimal distortion and reduced focus breathing. Close-focus distances range from 0.31m to 0.73m, enabling dramatic close-up work. The lenses are fully manual and support Zeiss eXtended Data for real-time metadata, distortion, and shading correction.
The eight core lenses will be available from August. Availability for the remaining lenses will follow later. No prices have yet been confirmed. More info from Sigma.
Sigma's new Aizu primes
