50 mm f/1.4 AS UMC vs YN 50 mm f/1.8X DA DSM Pro
Samyang
50 mm f/1.4 AS UMC
Yongnuo
YN 50 mm f/1.8X DA DSM Pro
Here we are comparing the Samyang 50 mm f/1.4 AS UMC and the Yongnuo YN 50 mm f/1.8X DA DSM Pro. The Samyang 50 mm f/1.4 AS UMC is a 50mm standard prime lens with a maximum aperture of f/1.4, released in 2014. The Yongnuo YN 50 mm f/1.8X DA DSM Pro is a 50mm telephoto prime lens with a maximum aperture of f/1.8, released in 2023.
There is a 9 years difference between the Samyang 50 mm f/1.4 AS UMC and the Yongnuo YN 50 mm f/1.8X DA DSM Pro — the newer design may benefit from more recent optical engineering and coatings.
Below you will find a detailed side-by-side comparison of their specifications, features, and key differences.
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| Compare | Fastest Aperture | |
|---|---|---|
| Mount | ||
| Sensor Size | Full Frame | APS-C |
| Best For | Portrait Street | Portrait Street |
Price & Availability | ||
| Shop | ||
Optical Specifications | ||
| Focal Length | 50 mm | 50 mm |
| Aperture | f/1.4-22 | f/1.8 |
| Aperture Blades | 8 | 9 |
Features | ||
| Autofocus | Yes | Yes |
| Image Stabilization | No | No |
| Weather Sealed | No | No |
Close-up Performance | ||
| Min. Focus Distance | 0.45 m | 0.45 m |
| Max. Magnification | - | 0.15x |
Physical Specifications | ||
| Weight | 535 g | 387 g |
| Length | 81.6 mm | 68 mm |
| Diameter | 74.7 mm | 85 mm |
| Filter Thread | 77 mm | 58 mm |
Price & Availability | ||
| Release Year | 2014 | 2023 |
| Shop | ||
Shopping links may contain affiliate codes that support this site at no extra cost to you.
Comparing Samyang 50 mm f/1.4 AS UMC (50 mm, f/1.4-22) and Yongnuo YN 50 mm f/1.8X DA DSM Pro (50 mm, f/1.8).
Yongnuo YN 50 mm f/1.8X DA DSM Pro is the lightest at 387 g, Samyang 50 mm f/1.4 AS UMC weighs 535 g.
Samyang 50 mm f/1.4 AS UMC offers the fastest maximum aperture at f/1.4-22, allowing for better low-light performance and shallower depth of field.
Samyang 50 mm f/1.4 AS UMC can focus closest at 0.45 m minimum focus distance.
Use the detailed comparison table below to see all specifications side-by-side and find the perfect lens for your photography needs.
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