Samyang 50mm F1.4 AS UMC § 03 Head to head
Samyang 50mm F1.4 AS UMC vs Viltrox AF 50 mm f/1.4 Pro
Samyang 50mm f/1.4 is 225 g lighter. Viltrox 50mm f/1.4 has a more aperture blades.
The Samyang 50mm F1.4 AS UMC is a 50mm f/1.4 prime, and the Viltrox AF 50 mm f/1.4 Pro is a 50mm f/1.4 prime. On paper the Samyang 50mm F1.4 AS UMC comes out ahead, 3 advantages to 2, but which one suits you depends on what you shoot.
Samyang 50mm F1.4 AS UMC 
Viltrox AF 50 mm f/1.4 Pro 01
Key differences
Why is the Samyang 50mm F1.4 AS UMC better than the Viltrox AF 50 mm f/1.4 Pro?
- 225 g lighter (575 g vs 800 g)
- 29 mm shorter (81.6 mm vs 111 mm long)
- Has a physical aperture ring
Why is the Viltrox AF 50 mm f/1.4 Pro better than the Samyang 50mm F1.4 AS UMC?
- More aperture blades (11 vs 8)
- Newer design (2025 vs 2015)
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Which should you buy?
- portrait For portrait photography, the Samyang 50mm F1.4 AS UMC has the edge: it is 225 g lighter to carry.
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Specification
| Specification | Samyang 50mm F1.4 AS UMC | Viltrox AF 50 mm f/1.4 Pro |
|---|---|---|
| Focal length | 50mm | 50mm |
| Maximum aperture | f/1.4 | f/1.4 |
| Minimum aperture | f/22 | f/16 |
| Lens type | Standard prime lens | Prime lens |
| Format | Full Frame | Full frame |
| Weight | 575 g (1.27 lbs) ◆ | 800 g |
| Dimensions | 73.5 mm (diameter) x 81.6 mm (length) | 111 x 84.5 mm |
| Minimum focusing distance | 0.45 m (17.72 in) | 0.45 m (0.145x magnification) |
| Maximum magnification | 0.17x | — |
| Image stabilization | No | No |
| Weather sealing | No | — |
| Aperture ring | Yes | No |
| Aperture blades | 8 | 11 ◆ |
| Optical construction | 9 elements in 6 groups | 15 elements / 11 groups |
| Filter size | 77 mm | 77 mm |
| Lens mount | Canon EF, Nikon F, Pentax K, Sony A, Sony E | Sony E, Nikon Z |
| Released | 2015 | 2025 |
| Price | — | $549 list price |
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Size
- A · Samyang
- B · Viltrox
- 81.6 × 73.5 mm
- 111 × 84.5 mm
The Viltrox AF 50 mm f/1.4 Pro is 29 mm longer and 225 g heavier than the Samyang 50mm F1.4 AS UMC.
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Sample frames
Samyang 50mm F1.4 AS UMC
Viltrox AF 50 mm f/1.4 Pro
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Video reviews
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Questions
- Which is lighter, the Samyang 50mm F1.4 AS UMC or the Viltrox AF 50 mm f/1.4 Pro?
- The Samyang 50mm F1.4 AS UMC weighs 575 g, 225 g less than the Viltrox AF 50 mm f/1.4 Pro (800 g).
- Do the Samyang 50mm F1.4 AS UMC and the Viltrox AF 50 mm f/1.4 Pro have image stabilization?
- No, neither lens has optical image stabilization; rely on in-body stabilization if your camera has it.
- Is the Samyang 50mm F1.4 AS UMC or the Viltrox AF 50 mm f/1.4 Pro better for portrait photography?
- For portrait photography, the Samyang 50mm F1.4 AS UMC has the edge: it is 225 g lighter to carry.
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Other comparisons
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- Carl Zeiss Otus ML 50 mm f/1.4 vs Samyang 50mm F1.4 AS UMC
- Samyang 50mm F1.4 AS UMC vs Sigma A 50 mm f/1.4 DG DN