Compare Samyang 35mm F1.4 AS UMC vs Samyang 21mm F1.4 ED AS UMC CS vs Samyang 20mm F1.8 ED AS UMC
Construction
Aperture Blades
9 blades, Circular blades
7 blades
Colors
Black
Form Factor
Wide-Angle Prime Lens
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
APS-C
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Micro Four Thirds-mount, Pentax K-mount, Sony A-mount, Sony E-mount, Samsung NX-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
Optical Formula | Elements
12 elements
8 elements
13 elements
Optical Formula | Groups
10 groups
7 groups
12 groups
Optical Formula | Special Glass
2 high-refraction glass elements1 aspherical element groups
3 aspherical and 2 ED elements + Ultra Multi Coating groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
58 mm / 2.28 in
77 mm / 3.03 in
Size | Diameter
63 mm / 2.48 in
64 mm / 2.52 in
83 mm / 3.27 in
Size | Length
112 mm / 4.41 in
68 mm / 2.68 in
88 mm / 3.46 in
Weight
660 g / 23.32 oz
275 g / 9.72 oz
497 g / 17.56 oz
Function
Angle Of View
63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical
69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
Aperture
f/1.4 ~ f/22
f/1.4 ~ f/22
f/1.8 ~ f/22
Autofocus
No
No
No
Crop Factor
1.5
Focal Length
35 mm
21 mm
20 mm
Focal Length (35mm Equivalent)
31.5 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Min Focus Distance
300 mm / 11.81 in
280 mm / 11.02 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2010-09-16
2015-09-21
2016-08-08
Reviews
Neofiliac score
68%
50%
59%
Pros
- Bright maximum aperture
- Good level of resolution
- Bright maximum aperture
- Very sharp
- Good color rendition
- Rather affordable
Cons
- Quite large and heavy
- Lacks weather sealing
- Lacks weather sealing
- Not the highest grade of build
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