SIRUI 20mm T1.8 anamorphic cinema lens with 1.33x squeeze and autofocus for Super 35 sensors.
The SIRUI 20mm T1.8 1.33x S35 AF is an anamorphic cine lens from the Chinese manufacturer SIRUI. It combines a 1.33x anamorphic squeeze factor with autofocus – a rare combination for anamorphic lenses – and is designed for cameras with Super 35/APS-C sensors. When shooting in 16:9 and subsequently desqueezing, an aspect ratio of approximately 2.35:1 is achieved, offering the classic widescreen look with oval bokeh and horizontal flares.
The lens is available in two flare variants: Blue (strong blue streak flares) and Neutral (subtle, uncolored flares). It is offered with multiple mounts, including Sony E, Nikon Z, FUJIFILM X, Micro Four Thirds, and Leica L.
| Feature | Value |
|---|---|
| Focal Length | 20 mm |
| Squeeze Factor | 1.33x |
| Aperture Range | T1.8 – T22 |
| Aperture Blades | 11 |
| Image Circle / Sensor Coverage | Super 35 (approx. 37 mm image circle) |
| Minimum Focusing Distance | 0.4 m |
| Focus | Autofocus (STM stepping motor), Focus-by-wire, with Eye-Tracking |
| Front Diameter | 80 mm |
| Firmware Port | USB-C (female) |
| Mounts | Sony E, Nikon Z, FUJIFILM X, Micro Four Thirds, Leica L |
According to the manufacturer, the lens weighs around 480 g and has a length of approximately 96 mm. The autofocus operates quietly and supports eye detection; additional buttons on the lens barrel allow switching focus modes and an AF lock.
Due to its low weight and compact design, the lens is suitable for handheld shots as well as gimbal and vehicle mounts. The fast T1.8 maximum aperture supports low-light shooting and provides significant background separation with the oval bokeh typical of anamorphic lenses.
Autofocus with eye tracking is unusual in the anamorphic realm and simplifies documentary or one-person crew setups where a dedicated focus puller is not available. As a focus-by-wire system, it can also be combined with compatible electronic follow-focus solutions. Firmware updates can be installed via the USB-C port.
Als Kameramann schätze ich besonders den Autofokus dieses Anamorphen, der mir bei dynamischen Szenen enorm hilft und präzises Fokussieren ermöglicht. Die charakteristischen ovalen Bokehs und horizontalen Flares verleihen meinen Bildern sofort den gewünschten Kinofilm-Look, während die T1.8-Blende auch bei Available Light noch genug Spielraum lässt.
Für mich als Regisseur eröffnet dieses Objektiv neue visuelle Möglichkeiten, da der anamorphe Look die emotionale Wirkung von Weitwinkel-Einstellungen verstärkt. Die 2,39:1-Bildkomposition zwingt mich zu bewussteren Entscheidungen bei der Kadrierung und hilft dabei, eine kinematographischere Erzählweise zu entwickeln.
Aus Produktionssicht ist dieses Objektiv eine kostengünstige Alternative zu teuren Zeiss- oder Cooke-Anamorphen, ohne dabei wesentliche Qualitätseinbußen hinnehmen zu müssen. Der Autofokus reduziert die Anforderungen an den Focus Puller und kann bei kleineren Teams sogar Personal einsparen, was sich positiv auf das Budget auswirkt.
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