Compare Samyang 10mm F2.8 ED AS NCS CS vs Samyang 12mm F2.8 ED AS NCS Fisheye vs Sony 20mm F1.8 G
Construction
Aperture Blades
6 blades, Manual aperture setting via lens ring
7 blades, Circular blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Physical aperture ring
Lens Mount
Canon EF-M-mount, Canon EF-mount, Micro Four Thirds-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, Sony A-mount, Sony E-mount
Sony E-mount
Motor
Linear Motor
Optical Formula | Elements
14 elements
12 elements
14 elements
Optical Formula | Groups
10 groups
8 groups
12 groups
Optical Formula | Special Glass
2 aspherical elements, 1 ED glass element groups
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
86 mm / 3.39 in
77 mm / 3.03 in
74 mm / 2.91 in
Size | Length
77 mm / 3.03 in
73 mm / 2.87 in
85 mm / 3.35 in
Weight
580 g / 20.49 oz
515 g / 18.20 oz
373 g / 13.18 oz
Function
Angle Of View
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical
180° Diagonal (fisheye)
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
Crop Factor
1.5
Focal Length
10 mm
12 mm
20 mm
Focal Length (35mm Equivalent)
15.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.22x
Min Focus Distance
250 mm / 9.84 in
200 mm / 7.87 in
190 mm / 7.48 in
Production
Accessory
Lens Hood: Integrated hood (supplied)
Lens hood included
Lens hood included
Debut
2013-12-06
2014-11-01
2020-02-25
Model Name
SEL20F18G
Reviews
Neofiliac score
40%
40%
88%
Pros
- One of the widest rectilinear lens for APS-C
- Reasonable IQ
- Bright f/2.8 aperture
- 180° FOV
- Reasonably good sunstar
- Weather-sealed
- Declickable aperture ring
- Very sharp corner to corner
- Low distortion
Cons
- Lacks front filter thread
- Lacks front filter thread
- Lacks weather sealing
- Not the sharpest
- Not the most solidly-built
- f/1.8 limiting for night photography
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