Sirui Saturn RF50B-A 50mm
At just 465g, the carbon fiber build makes this the lightest full-frame 1.6x anamorphic, delivering a 2.4:1 or wider 2.8:1 aspect ratio with a T2.9 aperture and 10-blade diaphragm for oval bokeh. Its compact size mounts on gimbals and FPV drones for unique overhead perspectives, and optional blue or natural flare coatings add stylistic control. This manual-focus lens suits solo filmmakers and drone operators prioritizing a portable, cinematic look without heavy rigging.
Snapshot
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Based on 7 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 50 |
| Focal Length Max | 50 |
| Elements | 17 |
| Groups | 12 |
Aperture
| Max Aperture | T16 |
| Min Aperture | T2.9 |
| Constant | Yes |
| Diaphragm Blades | 10 |
Build
| Mount | Canon RF |
| Format | full-frame |
| Weight | 0.5 kg / 1.0 lbs |
| Filter Thread | 62 |
AF & Stabilization
| AF Type | Manual Focus |
| Stabilization | Yes |
Focus
| Min Focus Distance | 900 |
| Max Magnification | 1:16.2 |
vs Competition
| Spec | Sirui Saturn RF50B-A 50mm | Sigma Contemporary 18-50mm f/2.8 DC DN | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 24-200mm f/4-6.3 VR | Sony E PZ 16-50mm f/3.5-5.6 OSS | Panasonic LUMIX S S-R28200 |
|---|---|---|---|---|---|---|
| Focal Length | 50mm | 18-50mm | 17-70mm | 24-200mm | 16-50mm | 28-200mm |
| Max Aperture | T16 | f/2.8 | f/2.8 | f/4 | f/3.5 | f/4 |
| Mount | Canon RF | Sony E | Sony E | Nikon Z | Sony E | L-Mount |
| Stabilization | true | false | true | true | true | true |
| Weather Sealed | false | true | true | true | true | true |
| Weight (g) | 465 | 290 | 544 | 570 | 107 | 413 |
| AF Type | Manual Focus | stepping motor | RXD | stepping motor | Autofocus | Autofocus |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Sirui Saturn RF50B-A 50mm | 12.7 | 39.1 | 59.5 | 46 | 69.9 | 39.8 | 80.5 | 33.6 | 55.1 | 82.4 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.6 | 80.4 | 86.5 | 90.8 | 82.5 | 82.8 | 80.5 | 78.5 | 90.1 | 36.7 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.7 | 85.7 | 69.8 | 84.9 | 91 | 82.8 | 63.5 | 89.4 | 86 | 82.4 |
| Nikon NIKKOR Z 24-200mm f/4-6.3 VR Compare | 87.6 | 62.9 | 68 | 37.8 | 92.9 | 64.6 | 0 | 96.6 | 90.1 | 97 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.7 | 73.7 | 98.6 | 43.2 | 69 | 75.9 | 63.5 | 83.1 | 82 | 93.5 |
| Panasonic LUMIX S S-R28200 Compare | 53.7 | 76.4 | 78.3 | 73.9 | 92 | 64.6 | 22.3 | 95.4 | 77.1 | 99.5 |
Price
Value & Pricing
Amazon.com.br 1 offer From R$7,682
We started tracking prices for this product on Jul 18, 2026. The chart appears once we have more data.
