Compare Samyang 20mm F1.8 ED AS UMC vs Samyang 8mm F2.8 UMC Fisheye II vs 7Artisans 7.5mm F2.8 Mark II
Construction
Aperture Blades
7 blades
6 blades
7 blades
Colors
Silver, black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Manual focus, Fisheye, Prime lens
Image Size
Full-Frame
APS-C
APS-C
Lens Barrel
Physical aperture ring, Distance scale
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
Canon EF-M-mount, Fujifilm X-mount, Samsung NX-mount, Sony E-mount
E-mount, X-mount, EF-M-mount, Micro Four Thirds, Z-mount
Optical Formula | Elements
13 elements
11 elements
11 elements
Optical Formula | Groups
12 groups
8 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2 aspherical + 3 ED, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
N/A
Size | Diameter
83 mm / 3.27 in
60 mm / 2.36 in
Size | Length
88 mm / 3.46 in
65 mm / 2.56 in
Weight
497 g / 17.56 oz
265 g / 9.36 oz
265 g
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
180° Diagonal (fisheye)
190°
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
F/2.8 ~ f/16
Autofocus
No
No
Crop Factor
1.5
Focal Length
20 mm
8 mm
7.5 mm
Focal Length (35mm Equivalent)
12.0 mm
11 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
N/A
Weather Resistance
No
No
Performance
Min Focus Distance
200 mm / 7.87 in
300 mm / 11.81 in
15 cm
Production
Accessory
Lens hood included
Debut
2016-08-08
2014-03-21
2021-02
Made In
China
Reviews
Neofiliac score
59%
31%
Pros
- Rather affordable
- 180° FOV
- Reasonably well built
- Fisheye-Hemi plugin
- Fully manual
- Good color reproduction
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks front filter thread
- Lacks weather sealing
- High chromatic aberration
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