Compare Samyang 20mm F1.8 ED AS UMC vs Zeiss Biogon T* 2.8/25 ZM
Construction
Aperture Blades
7 blades
Colors
Silver or black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, 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
Leica M-mount
Material
metal barrel, metal mount
Optical Formula | Elements
13 elements
9 elements
Optical Formula | Groups
12 groups
7 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
46 mm / 1.81 in
Size | Diameter
83 mm / 3.27 in
53 mm / 2.09 in
Size | Length
88 mm / 3.46 in
71 mm / 2.80 in
Weight
497 g / 17.56 oz
260 g / 9.19 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
Autofocus
No
No
Focal Length
20 mm
25 mm
Focus Type
Internal
Image Stabilization
No
No
Weather Resistance
No
Performance
Max Magnification
0.056
Min Focus Distance
200 mm / 7.87 in
500 mm / 19.69 in
Production
Accessory
Lens hood included
Debut
2016-08-08
Reviews
Neofiliac score
59%
70%
Pros
- Rather affordable
- Great build quality
- Low distortion
Cons
- Lacks weather sealing
- Not the highest grade of build
- Low maximum magnification
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