Compare 7Artisans 25mm F1.8 vs KamLan 8mm F3.0 Fisheye vs Olympus 9mm F8 Fisheye
Construction
Aperture Blades
7 blades
Colors
Black
Form Factor
Normal Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
APS-C
MFT
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Sony E-mount
Canon EF-M-mount, Sony E-mount
Micro Four Thirds-mount
Material
Aluminum
Plastic
Optical Formula | Elements
7 elements
11 elements
5 elements
Optical Formula | Groups
5 groups
9 groups
4 groups
Optical Formula | Special Glass
2 aspherical elements groups
Dimensions
Filter Diameter
46 mm / 1.81 in
Size | Diameter
51 mm / 2.01 in
56 mm / 2.20 in
Size | Length
32 mm / 1.26 in
13 mm / 0.51 in
Weight
143 g / 5.05 oz
245 g / 8.66 oz
30 g / 1.06 oz
Function
Angle Of View
60.0° Diagonal | 51.3° Horizontal | 35.5° Vertical
180.0° Diagonal (fisheye)
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
Aperture
f/1.8 ~ f/22
f/3 ~ f/22
f/8 ~ f/8
Autofocus
No
No
No
Crop Factor
1.5
1.5
2.0
Focal Length
25 mm
8 mm
9 mm
Focal Length (35mm Equivalent)
37.5 mm
12.0 mm
18.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.046x
Min Focus Distance
180 mm / 7.09 in
100 mm / 3.94 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens hood sold separately
Debut
2017-06-28
2018-03-21
2014-01-29
Reviews
Neofiliac score
59%
40%
48%
Pros
- Short barrel
- Light in the hand
- Appears well-built
- 180° FOV
- Compact and lightweight
- Negligible size and weight
Cons
- Lacks weather sealing
- Not the strongest in optical performance
- Lacks front filter thread
- Lacks weather sealing
- Dark f/8 aperture
- Lacks front filter thread
- Not a serious lens
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