Sirui's 35mm anamorphic for Canon RF APS-C — 1.33x squeeze at f/1.8 for cinematic widescreen.
The Sirui 35mm f/1.8 1.33× Anamorphic was released approximately 2021 as an anamorphic cinema prime for APS-C bodies, available in Canon RF and other mounts. Thirteen elements in 9 groups. Ten aperture blades (stepless iris). 67mm filter thread. At 700g. 0.85m MFD. 1.33× horizontal squeeze ratio producing 2.40:1 de-squeezed format.
Thirteen elements in 9 groups (Schott optical glass). Ten aperture blades (stepless iris). The 67mm filter thread. At 700g. Minimum focus distance of 0.85m. Manual focus (191° rotation). 1.33× horizontal anamorphic squeeze — de-squeeze to 2.40:1 in post. APS-C image circle (does NOT cover full Super 35 frame despite some marketing references). Canon RF mount (also available in E, L, X, Z mounts).
The 1.33× squeeze ratio compresses the horizontal field of view in-camera, then de-squeezes in post to produce the 2.40:1 cinematic widescreen format. At 35mm on APS-C, the un-squeezed equivalent is approximately 53mm × 1.33 = ~40mm equivalent in the wider anamorphic dimension. Anamorphic characteristics include horizontal lens flares and oval bokeh highlights. Stepless iris enables smooth aperture transitions during recording.
On the used market the Sirui 35mm f/1.8 1.33× Anamorphic is available at entry-level anamorphic prime pricing. Condition checks: manual focus helicoid smoothness, stepless iris operation, 67mm front element for marks. APS-C only (does not cover full Super 35). Available in multiple mounts — confirm mount variant.