Compare Samyang 21mm F1.4 ED AS UMC CS vs Samyang 20mm F1.8 ED AS UMC vs Samyang AF 24-70mm F2.8
Construction
Aperture Blades
9 blades, Circular blades
7 blades
9 rounded aperture blades
Colors
Black
Form Factor
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Zoom 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, Fujifilm X-mount, Micro Four Thirds-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
Sony E-mount
Motor
Linear STM
Optical Formula | Elements
8 elements
13 elements
17 elements
Optical Formula | Groups
7 groups
12 groups
14 groups
Optical Formula | Special Glass
3 aspherical and 2 ED elements + Ultra Multi Coating groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2x ASP, 1x H-ASP, 3x HR, 3x ED groups
Dimensions
Filter Diameter
58 mm / 2.28 in
77 mm / 3.03 in
82 mm
Size | Diameter
64 mm / 2.52 in
83 mm / 3.27 in
88 mm
Size | Length
68 mm / 2.68 in
88 mm / 3.46 in
128.5 mm / 5.1 in
Weight
275 g / 9.72 oz
497 g / 17.56 oz
1027 g / 36.2 oz
Function
Angle Of View
69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
53˚ ~ 86˚
Aperture
f/1.4 ~ f/22
f/1.8 ~ f/22
f/2.8 ~ f/22
Autofocus
No
No
Crop Factor
1.5
Focal Length
21 mm
20 mm
24 ~ 70 mm
Focal Length (35mm Equivalent)
31.5 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Zoom Type
External zoom
Performance
Max Magnification
0.1x wide ~ 0.27x tele
Min Focus Distance
280 mm / 11.02 in
200 mm / 7.87 in
35 cm / 1.15 ft
Production
Accessory
Lens hood included
Lens hood included
Debut
2015-09-21
2016-08-08
2021-10
Made In
Korea
Reviews
Neofiliac score
50%
59%
Pros
- Bright maximum aperture
- Very sharp
- Good color rendition
- Rather affordable
Cons
- Lacks weather sealing
- Lacks weather sealing
- Not the highest grade of build
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