Overview
The SIRUI Astra 75mm T1.8 1.33x Full-Frame AF Anamorphic Cine Lens combines a constant 1.33x squeeze ratio with a fast T1.8 design to deliver a classic widescreen cinematic look (2.35:1) from 16:9 capture—without cropping or pixel loss.
Designed for mirrorless production, the Astra Series brings fast, precise autofocus to full-frame anamorphic shooting, helping solo operators and small teams work quickly while maintaining the signature anamorphic character.
Core Features
- Constant 1.33x squeeze ratio restores a classic widescreen cinematic look without cropping or pixel loss.
- T1.8 fast aperture supports low-light shooting and creates shallow depth of field for natural subject separation.
- Fast and precise autofocus increases efficiency and eliminates the need for a focus puller.
- Two flare options (blue flare and neutral flare) highlight classic anamorphic character.
- 44mm image circle fully covers full-frame sensors for mirrorless compatibility.
- Oval bokeh and vertical background stretch bring cinematic artistry to life.
Set Consistency
Across the Astra Series, color and tone remain uniform between focal lengths, supporting faster swapping and smoother post-production.
Controls & Protection
- AF / MF switch plus FN button for autofocus lock/customization.
- IRIS LOCK for auto aperture at “A” or manual aperture control.
- CLICK ON / OFF supports stepped or stepless aperture control.
- Triple protection: dustproof, dirt-resistant, and raindrop-resistant.
General
| Format Coverage | Full Frame |
| Focal Length | 75mm |
| Squeeze Ratio | 1.33x (Constant) |
| Image Circle | 44mm |
Optical
| Lens Structure | 18 Elements in 13 Groups (4 Cylindrical Lenses and 1 Aspherical Lens) |
| FOV (Full Frame) | 18.52° (V) / 36.9° (H) / 40.37° (D) |
| Filter Size | M67 × P0.75 |
Aperture
| Aperture Range | T1.8 to T22 |
| Aperture Blades | 13 |
| Aperture Ring Diameter | 75.2mm / 2.96 inch |
| CLICK ON / OFF | Stepped aperture / stepless aperture |
| IRIS LOCK | Lock at “A” for auto aperture; switch for manual aperture control |
Focus
| Focus Method | MF / AF |
| Focus Motor | STM |
| Shooting Distance | 0.6 m (1.97 ft) to ∞ |
| Max Magnification | -0.165 (V) / -0.123 (H) |
| Focus Ring Rotation Angle | 136° |
| FN | Auto focus lock/customization |
Physical
| Max Diameter | Φ80mm / 3.15 inch |
| Focus Ring Diameter | Φ80mm / 3.15 inch |
| Outer Diameter | Φ72mm |
| Protection | Triple protection (Dustproof, Dirt-Resistant, Raindrop-Resistant) |
| Dual Scale | Feet/Meter |
What's Included
- SIRUI Astra 75mm T1.8 1.33x Full-Frame AF Anamorphic Cine Lens (Sony E, Neutral Flare)
- Front Lens Cap
- Rear Lens Cap
- Lens Cleaning Cloth
- Carrying Bag
- Barcode: 87591
- UPC Barcode: 6952060078366
- Supplier Code: AST-75-EN