Compare Samyang 12mm F2.8 ED AS NCS Fisheye vs Laowa 12mm f/2.8 Zero-D vs Sony 20mm F1.8 G
Construction
Aperture Blades
7 blades, Circular blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring
Physical aperture ring
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sony A-mount, Sony E-mount
Canon EF-mount, Canon RF-mount, Leica L-mount, Nikon F-mount, Nikon Z-mount, Pentax K-mount, Sony A-mount, Sony E-mount
Sony E-mount
Motor
Linear Motor
Optical Formula | Elements
12 elements
16 elements
14 elements
Optical Formula | Groups
8 groups
10 groups
12 groups
Optical Formula | Special Glass
2 aspherical, 3 ED, nano coating system groups
2 aspherical + 3 ED elements, Nano AR coating groups
Dimensions
Filter Diameter
67 mm / 2.64 in
Size | Diameter
77 mm / 3.03 in
75 mm / 2.95 in
74 mm / 2.91 in
Size | Length
73 mm / 2.87 in
83 mm / 3.27 in
85 mm / 3.35 in
Weight
515 g / 18.20 oz
609 g / 21.52 oz
373 g / 13.18 oz
Function
Angle Of View
180° Diagonal (fisheye)
122.0° Diagonal | 112.6° Horizontal | 90.0° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
Aperture
f/2.8 ~ f/22
f/2.8 ~ f/22
f/1.8 ~ f/16
Autofocus
No
No
Yes
Focal Length
12 mm
12 mm
20 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.2x
0.22x
Min Focus Distance
200 mm / 7.87 in
180 mm / 7.09 in
190 mm / 7.48 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2014-11-01
2016-07-26
2020-02-25
Made In
China
Model Name
SEL20F18G
Reviews
Neofiliac score
40%
50%
88%
Pros
- 180° FOV
- Reasonably good sunstar
- One of the widest rectilinear FF lens
- Solid build quality
- Low distortion
- Reasonably sharp
- Weather-sealed
- Declickable aperture ring
- Very sharp corner to corner
- Low distortion
Cons
- Lacks front filter thread
- Lacks weather sealing
- Not the sharpest
- Lacks front filter thread
- Not the most solidly-built
- f/1.8 limiting for night photography
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