Samyang 50mm f/1.4 AS UMC vs Sigma 50mm f/1.4 CL DG Contemporary

Both are Sony E prime lenses for full frame. Here is what actually differs.

Samyang

Pick the Samyang 50mm f/1.4 AS UMC if

Our spec data shows no clear advantage for this lens.

Pick the Sigma 50mm f/1.4 CL DG Contemporary if

You want the lighter lens to carry: 190 g lighter (375 g vs 565 g)
You want autofocus (Linear motor): the Samyang 50mm f/1.4 AS UMC is manual focus only
You want a compact lens: 56 mm vs 100.7 mm long

Spec differences

9 differences

Specifications that differ between the Samyang 50mm f/1.4 AS UMC and the Sigma 50mm f/1.4 CL DG Contemporary
	Samyang 50mm f/1.4 AS UMC	Sigma 50mm f/1.4 CL DG Contemporary
Brand	Samyang	Sigma
Weight	565 g	375 g lighter
Length	100.7 mm	56 mm shorter
Diameter	81.6 mm	64.7 mm slimmer
Filter thread	77 mm	52 mm
Max magnification	not listed	0.15×
Aperture blades	not listed	14
Autofocus motor	Manual focus	Linear motor
Weather sealing	not listed	Yes

8 identical specs hidden: mount, type, format, focal length, max aperture, min focus distance, optical design, image stabilization. Show all

Mount: Sony E both
Type: Prime both
Format: Full frame both
Focal length: 50mm both
Max aperture: f/1.4 both
Min focus distance: 0.45 m both
Optical design: 9 elements / 6 groups both
Image stabilization: No both

Our notes

Samyang 50mm f/1.4 AS UMC

Samyang 50mm f/1.4 AS UMC: a fast standard prime lens with a 50mm focal length and a maximum aperture of f/1.4, made for Sony E mount cameras, with aspherical elements. The natural field of view suits street, documentary and everyday photography.

Our notes