Compare Samyang 20mm F1.8 ED AS UMC vs Zeiss Planar T* 1.4/85 vs Zeiss Otus 55mm F1.4
Construction
Aperture Blades
7 blades
9 blades, 1/2 stop steps. ZE (Canon) version has no aperture ring.
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Short Telephoto Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale, DoF scale
Distance scale, DoF 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, Pentax K-mount
Canon EF-mount, Nikon F-mount
Material
Metal barrel, metal mout
Optical Formula | Elements
13 elements
6 elements
12 elements
Optical Formula | Groups
12 groups
5 groups
10 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
Dimensions
Filter Diameter
77 mm / 3.03 in
72 mm / 2.83 in
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
78 mm / 3.07 in
92 mm / 3.62 in
Size | Length
88 mm / 3.46 in
85 mm / 3.35 in
141 mm / 5.55 in
Weight
497 g / 17.56 oz
700 g / 24.73 oz
970 g / 34.28 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
43.0° Diagonal | 36.2° Horizontal | 24.6° 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
85 mm
55 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Performance
Max Magnification
0.1
0.15
Min Focus Distance
200 mm / 7.87 in
1000 mm / 39.37 in
500 mm / 19.69 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2013-10-07
Reviews
Neofiliac score
59%
93%
61%
Pros
- Rather affordable
- Bright maximum aperture
- F-mount with physical aperture ring
- Bright maximum aperture
- The finest built quality
- The best image quality found on a photographic lens
- Exceptional rendering
Cons
- Lacks weather sealing
- Not the highest grade of build
- Classic rendering not to everyone's taste
- Large physical size with large diameter and long barrel
- On the heavy side
- Rubber focus ring not as nice as metal ones
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