Compare Olympus 9mm F8 Fisheye vs Olympus 20mm F1.4 Pro vs Olympus 17mm F1.8
Construction
Aperture Blades
9 blades, Circular aperture diaphragm
7 blades, Circular aperture diaphragm
Colors
Silver, black
Form Factor
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Wide-Angle Prime Lens
Image Size
MFT
MFT
MFT
Lens Barrel
Distance scale, DoF scale
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Material
Plastic
Motor
Stepper motor
Micromotor
Optical Formula | Elements
5 elements
11 elements
9 elements
Optical Formula | Groups
4 groups
10 groups
6 groups
Optical Formula | Special Glass
2 aspherical elements groups
1 x Super ED, 3 ED, 2 Super HR, 2 Aspherical groups
2 Aspherical, HR glass element groups
Dimensions
Filter Diameter
58 mm / 2.28 in
46 mm / 1.81 in
Size | Diameter
56 mm / 2.20 in
63 mm / 2.48 in
58 mm / 2.28 in
Size | Length
13 mm / 0.51 in
62 mm / 2.44 in
36 mm / 1.42 in
Weight
30 g / 1.06 oz
247 g / 8.73 oz
120 g / 4.24 oz
Function
Angle Of View
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
56.8° Diagonal | 48.5° Horizontal | 33.4° Vertical
65.0° Diagonal | 55.8° Horizontal | 38.9° Vertical
Aperture
f/8 ~ f/8
f/1.4 ~ f/16
f/1.8 ~ f/22
Autofocus
No
Yes
Yes
Crop Factor
2.0
2.0
2.0
Focal Length
9 mm
20 mm
17 mm
Focal Length (35mm Equivalent)
18.0 mm
40.0 mm
34.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Weather Resistance
Yes
Performance
Max Magnification
0.046x
0.11x
0.08x
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
250 mm / 9.84 in
Production
Accessory
Lens hood sold separately
Lens Hood: LH-61G (supplied)
Debut
2014-01-29
2021-11-04
2012-06-15
Reviews
Neofiliac score
48%
84%
76%
Pros
- Negligible size and weight
- Bright maximum aperture
- Light in the hand
- Weather-sealed
- Beautifully constructed
- Compact and lightweight
- Good IQ stopped down
Cons
- Dark f/8 aperture
- Lacks front filter thread
- Not a serious lens
- No aperture ring or other features on the barrel
- Low maximum magnification
- Expensive for what it is
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