Overview
The SIRUI 24mm F2.8 1.33x Anamorphic is an anamorphic photo and cine lens from the Chinese manufacturer SIRUI. It produces the wide-screen look typical of anamorphic lenses: using cylindrical optics, the image is horizontally compressed (squeeze) during recording and de-squeezed in post-production. With a squeeze factor of 1.33x, a 16:9 sensor produces an aspect ratio of approximately 2.4:1 (CinemaScope) without having to crop the top and bottom of the image content.
The lens is designed for APS-C or Super 35 sensors and is manufactured as a pure manual focus lens without electronic aperture control. It belongs to the entry-level series with which SIRUI has made anamorphic filmmaking accessible for smaller budgets.
Technical Data
| Feature | Value |
|---|
| Focal Length | 24 mm |
| Squeeze Factor | 1.33x |
| Aperture | F2.8 (to F16) |
| Optical Construction | 13 elements in 10 groups |
| Diaphragm Blades | 8 |
| Sensor Coverage | APS-C / Super 35 |
| Minimum Focus Distance | 0.6 m |
| Focus Throw | 189.6° |
| Filter Thread | M72 x 0.75 (77 mm front filter) |
| Max. Diameter | 74 mm |
| Weight | approx. 770–810 g (depending on mount) |
The lens is available in several mount variants, including for Micro Four Thirds, Sony E, Canon EF-M, Nikon Z, and Fujifilm X; later versions were also released for L-Mount and Canon RF. Weight and length vary slightly depending on the mount (MFT approx. 770 g, Sony E/Fuji X/EF-M approx. 780 g, Nikon Z approx. 810 g).
On-Set Usage
Manual focus is achieved via a long throw with markings, allowing for precise focus pulling; a follow focus can be attached via the gear-compatible focus ring. Since the aperture is adjusted manually and steplessly, the lens is suitable for controlled lighting on set. The non-rotating front element allows the use of polarizing and graduated filters without changing their orientation during focusing.
As a wide-angle focal length in an anamorphic setup, the 24mm lens is typically used for wide shots, establishing shots, and tight interior spaces. Characteristic of anamorphic optics are the oval shape of the bokeh and horizontal lens flares, which SIRUI also offers in a blue flare variant for this series.