The Sirui 40mm T1.8 1.33x AF Anamorphic Cinema Lens with MFT-Mount is a standard anamorphic prime that covers Super 35 mm sensors. A standard focal length sees close to natural human perspective, which suits dialogue and coverage where the framing should not draw attention to itself. Its 1.33x squeeze produces a 2.36:1 field of view on a 16:9 sensor, the gentlest of the common squeeze factors and the easiest to pair with a standard 16:9 body. Anamorphic character is present but restrained. A fast T1.8 aperture lets camera operators separate subjects from their backgrounds or get the most out of available lighting when filming in darker environments, and the lens closes to T22. It uses an MFT-Mount with autofocus. Standard electronic contacts pass aperture and focus information between the lens and the camera body.
Key Features
Standard Super 35 mm Coverage
The lens covers Super 35 mm sensors, projecting a 37.0 mm image circle. A standard field of view sits near natural perspective, the neutral option for dialogue and everyday coverage where framing should not announce itself.
1.33x Anamorphic Squeeze
A 1.33x squeeze reaches 2.36:1 from a 16:9 sensor, the gentlest of the common anamorphic factors and the easiest to pair with a standard 16:9 body. Flares and oval bokeh are present but restrained, which suits work that wants anamorphic character without it taking over the frame.
T1.8 Maximum Aperture
At T1.8 the lens separates subjects cleanly from their backgrounds and gets the most out of available lighting when filming in darker environments. It closes to T22.
360° Focus Throw
Its 360° focus throw is long, spreading distance marks widely for precise, repeatable pulls, with a slower full rack as the trade.
Electronic Contacts
Contacts in the mount pass aperture and focus information between lens and body. The camera records those settings into metadata and can drive the iris electronically where the body supports it.
