Compare Samyang 7.5mm F3.5 UMC Fisheye vs Olympus 17mm F1.8 vs Olympus 8mm F1.8 Fisheye PRO
Construction
Aperture Blades
7 blades, Circular aperture diaphragm
7 blades, Circular
Colors
Silver, black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
MFT
MFT
MFT
Lens Barrel
Physical aperture ring, Distance scale
Distance scale, DoF scale
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Motor
Micromotor
Stepper motor
Optical Formula | Elements
9 elements
9 elements
17 elements
Optical Formula | Groups
7 groups
6 groups
15 groups
Optical Formula | Special Glass
2 Aspherical, HR glass element groups
1 aspherical, 3 super ED, 2 ED, 1 super HR, 2 HR lenses groups
Dimensions
Filter Diameter
46 mm / 1.81 in
Size | Diameter
60 mm / 2.36 in
58 mm / 2.28 in
62 mm / 2.44 in
Size | Length
48 mm / 1.89 in
36 mm / 1.42 in
80 mm / 3.15 in
Weight
197 g / 6.96 oz
120 g / 4.24 oz
314 g / 11.10 oz
Function
Angle Of View
180° Diagonal (fisheye)
65.0° Diagonal | 55.8° Horizontal | 38.9° Vertical
180° Diagonal (fisheye)
Aperture
f/3.5 ~ f/22
f/1.8 ~ f/22
f/1.8 ~ f/22
Autofocus
No
Yes
Yes
Crop Factor
2.0
2.0
2.0
Focal Length
7.5 mm
17 mm
8 mm
Focal Length (35mm Equivalent)
15.0 mm
34.0 mm
16.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.08x
0.2x
Min Focus Distance
90 mm / 3.54 in
250 mm / 9.84 in
120 mm / 4.72 in
Production
Accessory
Lens Hood: Built-in petal-type hood (supplied)
Lens hood included
Debut
2011-09-05
2012-06-15
2015-05-12
Reviews
Neofiliac score
50%
76%
67%
Pros
- Very light and compact
- 180° FOV
- Compact and lightweight
- Good IQ stopped down
- 180° FOV
- Weather-sealed
- Beautifully constructed
Cons
- Lacks front filter thread
- Lacks weather sealing
- Low maximum magnification
- Expensive for what it is
- Priced higher than full-frame fisheyes
- Lacks front filter thread
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