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Compare Samyang 12mm F2.8 ED AS NCS Fisheye vs Sony 20mm F1.8 G

Construction

Aperture Blades
7 blades, Circular blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring
Lens 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
12 elements
14 elements
Optical Formula | Groups
8 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
74 mm / 2.91 in
Size | Length
73 mm / 2.87 in
85 mm / 3.35 in
Weight
515 g / 18.20 oz
373 g / 13.18 oz

Function

Angle Of View
180° Diagonal (fisheye)
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
Aperture
f/2.8 ~ f/22
f/1.8 ~ f/16
Autofocus
No
Yes
Focal Length
12 mm
20 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
Yes

Performance

Max Magnification
0.22x
Min Focus Distance
200 mm / 7.87 in
190 mm / 7.48 in

Production

Accessory
Lens hood included
Lens hood included
Debut
2014-11-01
2020-02-25
Model Name
SEL20F18G

Reviews

Neofiliac score
40%
88%
Pros
  • 180° FOV
  • Reasonably good sunstar
  • Weather-sealed
  • Declickable aperture ring
  • Very sharp corner to corner
  • Low distortion
Cons
  • Lacks front filter thread
  • Lacks weather sealing
  • Not the sharpest
  • Not the most solidly-built
  • f/1.8 limiting for night photography

Price

Offers (incl. referral links)
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