Compare Samyang 20mm F1.8 ED AS UMC vs Zeiss Batis 18mm F2.8 vs Zeiss Batis 85mm F1.8
Construction
Aperture Blades
7 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
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
Sony E-mount
Sony E-mount
Motor
Linear Motor
Optical Formula | Elements
13 elements
11 elements
10 elements
Optical Formula | Groups
12 groups
10 groups
8 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
4 aspherical, 7 'special glass' elements groups
T* coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
78 mm / 3.07 in
105 mm / 4.13 in
Size | Length
88 mm / 3.46 in
80 mm / 3.15 in
78 mm / 3.07 in
Weight
497 g / 17.56 oz
330 g / 11.66 oz
475 g / 16.78 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
f/1.8 ~ f/22
Autofocus
No
Yes
Yes
Focal Length
20 mm
18 mm
85 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Yes
Weather Resistance
No
Yes
Yes
Performance
Max Magnification
0.11
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
800 mm / 31.50 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2016-04-14
2015-04-22
Reviews
Neofiliac score
59%
86%
93%
Pros
- Rather affordable
- Weather-sealed
- OLED display
- Quite lightweight for its focal length
- Optically stabilized
- Weather-sealed
- OLED display
- Rather lightweight for its focal length
Cons
- Lacks weather sealing
- Not the highest grade of build
- Barrel with large diameter
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