The SIRUI Astra 75 mm T1.8 brings autofocus to full-frame anamorphic filmmaking, pairing a consistent 1.33x squeeze with a fast cinema aperture. Its perspective suits portrait scenes, interviews and selective detail framing, and this L-Mount version has a neutral flare character.
Anamorphic framing and flare character
The constant 1.33x squeeze records a wider horizontal perspective than a spherical lens of the same focal length. When the footage is de-squeezed in post-production, it takes on an approximately 2.35:1 widescreen character from 16:9 capture, together with the elongated bokeh and visual depth associated with anamorphic optics.
Autofocus and practical cine handling
The T1.8 aperture is useful for controlled background blur and available-light scenes. An STM-driven autofocus system and AF/MF switch make the lens practical for independent productions, while cine-oriented focus and aperture controls allow more deliberate operation when needed. The neutral flare version is designed for L-Mount; minimum focus is 0.60 m.
SIRUI specifies a 13-blade aperture for the 75 mm model. Together with the longer focal length and anamorphic optics, this supports rounded, stretched background highlights that work well in portraits and interview scenes.
Key features
- Full-frame coverage and constant 1.33x anamorphic squeeze
- 75 mm focal length for storytelling and detailed framing
- Fast T1.8 maximum aperture
- STM autofocus with AF/MF switch
- 67 mm filter thread and common cine gear positions
- Minimum focusing distance: 0.60 m
- Neutral flare rendering
- L-Mount
What's in the box
- Astra 75 mm T1.8 1.33x anamorphic cine lens
- Front and rear lens caps
- Manufacturer warranty card
