The anamorphic lens Sirui 1.8 / 50mm 1.33x with MFT-mount is designed for APS-C cameras. Compared to a traditional 50mm APS-C lens, this lens produces cinematic 2.4:1 widescreen video, with a 33% increase in horizontal field of view; the result is equivalent to a wider, 37.5mm APS-C lens. After a de-squeeze, the captured image is displayed in an anamorphic 2.4:1 format in a 16:9 setting. Constructed from aluminum, the Sirui 1.8 / 50mm lens has high-quality German-made Schott optical glass elements, is compact and robust yet light enough for easy use with your compact APS-C camera.

One of the features of this lens is that it produces horizontal blue streaks with less stray light, which Sirui calls sci-fi horizontal flares. A key aspect of anamorphic lenses is highlighted oval bokeh, and this lens achieves a shallow depth of field and oval bokeh with its 10 aperture blades.