Compare Olympus 9mm F8 Fisheye vs Olympus 17mm F1.8 vs Olympus 25mm F1.8
Construction
Aperture Blades
7 blades, Circular aperture diaphragm
7 blades, Circular aperture diaphragm
Colors
Silver, black
Black or Silver
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Normal 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
Micromotor
Stepper motor
Optical Formula | Elements
5 elements
9 elements
9 elements
Optical Formula | Groups
4 groups
6 groups
7 groups
Optical Formula | Special Glass
2 aspherical elements groups
2 Aspherical, HR glass element groups
2 aspherical elements groups
Dimensions
Filter Diameter
46 mm / 1.81 in
46 mm / 1.81 in
Size | Diameter
56 mm / 2.20 in
58 mm / 2.28 in
56 mm / 2.20 in
Size | Length
13 mm / 0.51 in
36 mm / 1.42 in
41 mm / 1.61 in
Weight
30 g / 1.06 oz
120 g / 4.24 oz
136 g / 4.81 oz
Function
Angle Of View
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
65.0° Diagonal | 55.8° Horizontal | 38.9° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/8 ~ f/8
f/1.8 ~ f/22
f/1.8 ~ f/22
Autofocus
No
Yes
Yes
Crop Factor
2.0
2.0
2.0
Focal Length
9 mm
17 mm
25 mm
Focal Length (35mm Equivalent)
18.0 mm
34.0 mm
50.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Performance
Max Magnification
0.046x
0.08x
0.12x
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
240 mm / 9.45 in
Production
Accessory
Lens hood sold separately
Lens Hood: LH-49B (supplied)
Debut
2014-01-29
2012-06-15
2014-01-29
Reviews
Neofiliac score
48%
76%
76%
Pros
- Negligible size and weight
- Compact and lightweight
- Good IQ stopped down
- Compact and lightweight
Cons
- Dark f/8 aperture
- Lacks front filter thread
- Not a serious lens
- Low maximum magnification
- Expensive for what it is
- Not the sharpest normal lens
- Not competitively priced
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