Sirui Astra 50mm
With a 44mm image circle covering full-frame sensors, a constant T1.8 aperture, and 1.33x anamorphic squeeze for native 2.35:1 output, this autofocus, weather-sealed lens delivers cinematic character with reliable stabilization. Selectable blue or neutral flares and an AF/MF switch supporting LiDAR follow-focus provide direct, precise look control rarely seen in anamorphic primes. It’s best for independent filmmakers and portrait shooters needing anamorphic rendering and low-light flexibility in close-up scenarios on Sony E-mount bodies.
Focal length 50mm
Aperture T1.8
Mount L-Mount
stabilization Yes
Weather Sealed Yes
Weight 626 g
af type Autofocus
lens type prime
58 Overall Score
Price MX$0
No listings available
Snapshot
Pros & Cons
Pros
- Strong macro (97th percentile) 97th
- Strong aperture (94th percentile) 94th
- Strong bokeh (92nd percentile) 92nd
- Strong stabilization (83rd percentile) 83rd
Cons
- Below average social proof (12th percentile)
- Below average optical (18th percentile)
- Below average versatility (34th percentile)
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 50 |
| Focal Length Max | 50 |
Aperture
| Max Aperture | T1.8 |
| Min Aperture | T1.8 |
| Constant | Yes |
Build
| Mount | L-Mount |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.6 kg / 1.4 lbs |
AF & Stabilization
| AF Type | Autofocus |
| Stabilization | Yes |
Focus
| Min Focus Distance | 44 |
vs Competition
| Spec | Sirui Astra 50mm | Nikon NIKKOR Z 17-28mm f/2.8 | Tamron Di III 28-75mm f/2.8 VXD G2 | Sigma Contemporary 10-18mm f/2.8 DC DN | Panasonic Leica DG Vario-Elmarit H-ES12060 | Canon RF 28-70mm f/2.8 IS STM |
|---|---|---|---|---|---|---|
| Focal Length | 50mm | 17-28mm | 28-75mm | 10-18mm | 12-60mm | 28-70mm |
| Max Aperture | T1.8 | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/22 |
| Mount | L-Mount | Nikon Z | Sony E | Sony E | Micro Four Thirds | Canon RF |
| Stabilization | true | false | false | false | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 626 | 450 | 540 | 260 | 320 | 495 |
| AF Type | Autofocus | Stepping Motor | VXD | Autofocus | linear motor | STM |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Sirui Astra 50mm | 54.6 | 91.7 | 45.7 | 97.1 | 18.4 | 94.1 | 33.6 | 11.9 | 83.2 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87 | 88.1 | 73.7 | 86.3 | 87 | 85.8 | 68.1 | 64.5 | 38 |
| Tamron Di III 28-75mm f/2.8 VXD G2 Compare | 54.6 | 88.1 | 67.3 | 87.3 | 87.8 | 85.8 | 78.2 | 83 | 38 |
| Sigma Contemporary 10-18mm f/2.8 DC DN Compare | 54.6 | 83.5 | 87.4 | 93.3 | 81.6 | 85.8 | 69.1 | 68.7 | 38 |
| Panasonic Leica DG Vario-Elmarit H-ES12060 Compare | 98 | 88.1 | 83.2 | 50.4 | 90.2 | 85.8 | 93.1 | 63.4 | 83.2 |
| Canon RF 28-70mm f/2.8 IS STM Compare | 87 | 26 | 70.2 | 80.4 | 85 | 22.6 | 77.2 | 87.8 | 98.5 |
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
