Compare Samyang 20mm F1.8 ED AS UMC vs KamLan 8mm F3.0 Fisheye vs Pentax 03 Fish-Eye
Construction
Aperture Blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
APS-C
1/1.7"
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale, DoF scale
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, Sony E-mount
Pentax Q-mount
Material
Plastic mount
Optical Formula | Elements
13 elements
11 elements
6 elements
Optical Formula | Groups
12 groups
9 groups
5 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
41 mm / 1.61 in
Size | Length
88 mm / 3.46 in
31 mm / 1.22 in
Weight
497 g / 17.56 oz
245 g / 8.66 oz
29 g / 1.02 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
180.0° Diagonal (fisheye)
173° Diagonal (Q7)
Aperture
f/1.8 ~ f/22
f/3 ~ f/22
f/5.6
Autofocus
No
No
No
Crop Factor
1.5
4.6
Focal Length
20 mm
8 mm
3.2 mm
Focal Length (35mm Equivalent)
12.0 mm
14.7 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.06x
Min Focus Distance
200 mm / 7.87 in
100 mm / 3.94 in
90 mm / 3.54 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2016-08-08
2018-03-21
2011-06-23
Reviews
Neofiliac score
59%
40%
50%
Pros
- Rather affordable
- 180° FOV
- Compact and lightweight
- Extremely light and compact
- 173°FOV
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks front filter thread
- Lacks weather sealing
- Dark and fixed f/5.6 aperture
- Not made for IQ
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