Sirui Auto Focus 20mm T1.8 Anamorphic
Combining the cinematic quality of 2.35:1 widescreen imagery with the convenience of subject-tracking autofocus, this Sirui 20mm T1.8 1.33x S35 AF Anamorphic Lens is a versatile, wide-angle lens designed specifically for Sony E-mount cameras with Super 35 sensors. With a 1.33x squeeze factor and T1.8 maximum aperture, the lens ensures exceptional low-light performance and allows for stunning subject isolation with its signature oval-shaped bokeh.
Powered by a precision STM stepping motor, the Sirui 20mm delivers smooth, accurate, and quiet autofocus—a rare feature in anamorphic lenses. With eye-tracking capability and buttons for both focus mode and autofocus lock, the lens provides complete creative control. A female USB-C port enables firmware updates, ensuring lasting performance. Compact and lightweight, the lens fits advanced technology and visual quality into a form factor ideal for handheld, gimbal, and run-and-gun shooting, making it a powerful tool for both independent creators and professional productions.
Anamorphic Aesthetic
- 1.33x squeeze factor for 2.35:1 images in 16:9 mode
- Unique oval bokeh enhances subject separation and depth
- Horizontal field of view equivalent to 22mm full-frame lens
- Blue lens flares for cinematic effect
Optical Performance
- 37mm image circle covers Super 35 sensors or full-frame with vignette
- T1.8 to T22 aperture for low-light performance and depth of field control
- 15.7″ minimum focus distance for close-up shots
- Aspherical lens element minimizes chromatic aberration
Advanced Autofocus
- STM stepping motor for smooth, silent autofocus
- Eye-tracking autofocus for reliable subject tracking
- AF/MF switch to toggle between autofocus and manual focus
- AF-Lock button to hold focus or recall custom focus settings
Practical Design
- Uniform gear positioning with Sirui 40mm AF Anamorphic Lens
- Compact (3.8″ long) and lightweight (1.1 lb)
- 360° focus throw with standard gearing
Versatile Compatibility
- Compatible with Sony E-mount cameras
- Standard 77mm front filter thread
- Update lens firmware via female UCB-C port
