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Compare Samyang 20mm F1.8 ED AS UMC vs Olympus 9mm F8 Fisheye

Construction

Aperture Blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
MFT
Lens Barrel
Physical aperture ring, Distance 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
Micro Four Thirds-mount
Material
Plastic
Optical Formula | Elements
13 elements
5 elements
Optical Formula | Groups
12 groups
4 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2 aspherical elements groups

Dimensions

Filter Diameter
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
56 mm / 2.20 in
Size | Length
88 mm / 3.46 in
13 mm / 0.51 in
Weight
497 g / 17.56 oz
30 g / 1.06 oz

Function

Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
Aperture
f/1.8 ~ f/22
f/8 ~ f/8
Autofocus
No
No
Crop Factor
2.0
Focal Length
20 mm
9 mm
Focal Length (35mm Equivalent)
18.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
Weather Resistance
No

Performance

Max Magnification
0.046x
Min Focus Distance
200 mm / 7.87 in
200 mm / 7.87 in

Production

Accessory
Lens hood included
Lens hood sold separately
Debut
2016-08-08
2014-01-29

Reviews

Neofiliac score
59%
48%
Pros
  • Rather affordable
  • Negligible size and weight
Cons
  • Lacks weather sealing
  • Not the highest grade of build
  • Dark f/8 aperture
  • Lacks front filter thread
  • Not a serious lens

Price

Offers (incl. referral links)
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