Compare Samyang 10mm F2.8 ED AS NCS CS vs Samyang 20mm F1.8 ED AS UMC vs Viltrox AF 50mm F1.8
Connectivity
Ports
USB-C
Construction
Aperture Blades
6 blades, Manual aperture setting via lens ring
7 blades
9 rounded blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Autofocus lens for mirrorless cameras
Image Size
APS-C
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Lens Mount
Canon EF-M-mount, Canon EF-mount, Micro Four Thirds-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Canon EF-mount, Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
E-mount
Motor
STM+Lead screw stepping motor
Optical Formula | Elements
14 elements
13 elements
11 elements
Optical Formula | Groups
10 groups
12 groups
10 groups
Optical Formula | Special Glass
2 aspherical elements, 1 ED glass element groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
55 mm
Size | Diameter
86 mm / 3.39 in
83 mm / 3.27 in
Size | Length
77 mm / 3.03 in
88 mm / 3.46 in
Weight
580 g / 20.49 oz
497 g / 17.56 oz
340 g / 12 oz
Function
Angle Of View
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
47.6°
Aperture
f/2.8 ~ f/22
f/1.8 ~ f/22
F/1.8 - f/16
Autofocus
No
No
Crop Factor
1.5
Focal Length
10 mm
20 mm
50 mm
Focal Length (35mm Equivalent)
15.0 mm
Focus Type
Internal
Image Stabilization
No
No
Weather Resistance
No
Performance
Max Magnification
0.1x
Min Focus Distance
250 mm / 9.84 in
200 mm / 7.87 in
0.55 m / 21.7"
Production
Accessory
Lens Hood: Integrated hood (supplied)
Lens hood included
Debut
2013-12-06
2016-08-08
2021
Reviews
Neofiliac score
40%
59%
Pros
- One of the widest rectilinear lens for APS-C
- Reasonable IQ
- Bright f/2.8 aperture
- Rather affordable
Cons
- Lacks front filter thread
- Lacks weather sealing
- Not the highest grade of build
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