Compare Olympus 8-25mm F4 Pro vs Olympus 17mm F1.8 vs Olympus 8mm F1.8 Fisheye PRO
Construction
Aperture Blades
7 blades
7 blades, Circular aperture diaphragm
7 blades, Circular
Colors
Black
Silver, black
Black
Form Factor
Zoom Lens
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
MFT
MFT
MFT
Lens Barrel
Distance scale
Distance scale, DoF scale
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Material
Magnesium alloy
Motor
Linear Motor
Micromotor
Stepper motor
Optical Formula | Elements
16 elements
9 elements
17 elements
Optical Formula | Groups
10 groups
6 groups
15 groups
Optical Formula | Special Glass
1 DSA + 1 Super ED + 1 ED + 1 HR + 2 aspherical ED elements, ZERO coating groups
2 Aspherical, HR glass element groups
1 aspherical, 3 super ED, 2 ED, 1 super HR, 2 HR lenses groups
Dimensions
Filter Diameter
72 mm / 2.83 in
46 mm / 1.81 in
Size | Diameter
77 mm / 3.03 in
58 mm / 2.28 in
62 mm / 2.44 in
Size | Length
89 mm / 3.50 in
36 mm / 1.42 in
80 mm / 3.15 in
Weight
411 g / 14.52 oz
120 g / 4.24 oz
314 g / 11.10 oz
Function
Angle Of View
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) ~ 46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical (tele)
65.0° Diagonal | 55.8° Horizontal | 38.9° Vertical
180° Diagonal (fisheye)
Aperture
f/4 ~ f/22
f/1.8 ~ f/22
f/1.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
2.0
2.0
2.0
Focal Length
8 mm ~ 25 mm
17 mm
8 mm
Focal Length (35mm Equivalent)
16.0 mm ~ 50.0 mm
34.0 mm
16.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
Yes
Zoom Type
External zoom
Performance
Max Magnification
0.14x
0.08x
0.2x
Min Focus Distance
230 mm / 9.06 in
250 mm / 9.84 in
120 mm / 4.72 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2021-06-09
2012-06-15
2015-05-12
Reviews
Neofiliac score
48%
76%
67%
Pros
- Very appealing ultra-wide to normal focal range
- Beautifully constructed
- Weather-sealed
- Good IQ
- Compact and lightweight
- Good IQ stopped down
- 180° FOV
- Weather-sealed
- Beautifully constructed
Cons
- Dark maximum aperture
- External zoom without zoom lock
- Rather expensive for MFT
- Low maximum magnification
- Expensive for what it is
- Priced higher than full-frame fisheyes
- Lacks front filter thread
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