Compare Samyang 20mm F1.8 ED AS UMC vs Zeiss Otus 55mm F1.4 vs Zeiss Otus 28mm F1.4
Construction
Aperture Blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Distance scale, DoF scale
Distance scale
Lens 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
Canon EF-mount, Nikon F-mount
Canon EF-mount, Nikon F-mount
Material
Metal barrel, metal mout
Magnesium alloy
Optical Formula | Elements
13 elements
12 elements
16 elements
Optical Formula | Groups
12 groups
10 groups
13 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 double-sided aspheric element, 6 anomalous partial dispersion glass elements groups
Aspherical + APD elements, T* coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
95 mm / 3.74 in
Size | Diameter
83 mm / 3.27 in
92 mm / 3.62 in
88 mm / 3.46 in
Size | Length
88 mm / 3.46 in
141 mm / 5.55 in
137 mm / 5.39 in
Weight
497 g / 17.56 oz
970 g / 34.28 oz
1390 g / 49.12 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
43.0° Diagonal | 36.2° Horizontal | 24.6° Vertical
75.4° Diagonal | 65.5° Horizontal | 46.4° Vertical
Aperture
f/1.8 ~ f/22
f/1.4 ~ f/16
f/1.4 ~ f/16
Autofocus
No
No
No
Focal Length
20 mm
55 mm
28 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Performance
Max Magnification
0.15
0.18
Min Focus Distance
200 mm / 7.87 in
500 mm / 19.69 in
300 mm / 11.81 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2013-10-07
2015-10-14
Reviews
Neofiliac score
59%
61%
70%
Pros
- Rather affordable
- Bright maximum aperture
- The finest built quality
- The best image quality found on a photographic lens
- Exceptional rendering
- Bright maximum aperture
- The finest built quality
- Exceptional image quality
- Gorgeous rendering
Cons
- Lacks weather sealing
- Not the highest grade of build
- Large physical size with large diameter and long barrel
- On the heavy side
- Rubber focus ring not as nice as metal ones
- Quite large
- On the heavy side
- Rubber focus ring not as nice as metal ones
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