Compare Samyang 12mm F2.0 NCS CS vs Samyang 20mm F1.8 ED AS UMC vs Leica Tri-Elmar-M 16-18-21mm F4
Construction
Aperture Blades
6 blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Image Size
APS-C
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Samsung NX-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
Leica M-mount
Material
metal barrel, metal mount
Optical Formula | Elements
12 elements
13 elements
10 elements
Optical Formula | Groups
10 groups
12 groups
7 groups
Optical Formula | Special Glass
2 aspherical elements, 3 ED glass elements groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2 aspherical elements groups
Dimensions
Filter Diameter
67 mm / 2.64 in
77 mm / 3.03 in
Size | Diameter
73 mm / 2.87 in
83 mm / 3.27 in
Size | Length
59 mm / 2.32 in
88 mm / 3.46 in
Weight
260 g / 9.19 oz
497 g / 17.56 oz
Function
Angle Of View
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) / 91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical (tele)
Aperture
f/2 ~ f/22
f/1.8 ~ f/22
f/4 ~ f/22
Autofocus
No
No
No
Crop Factor
1.5
Focal Length
12 mm
20 mm
16 mm ~ 21 mm
Focal Length (35mm Equivalent)
18.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Performance
Max Magnification
0.03x
Min Focus Distance
200 mm / 7.87 in
200 mm / 7.87 in
500 mm / 19.69 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2014-03-21
2016-08-08
2006-09-14
Made In
Germany
Reviews
Neofiliac score
59%
59%
61%
Pros
- Interesting FOV
- Good level of resolution
- Great sunstar performance
- Rather affordable
- Unique zoom versatility for rangefinder
- Reaches 16mm, the widest for Leica M
Cons
- Not the best grade of build
- High distortion
- Lacks weather sealing
- Not the highest grade of build
- Dark maximum aperture
- Low maximum magnification
- Requires wide-angle viewfinder
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