Compare Olympus 17mm F1.2 Pro vs Samyang 7.5mm F3.5 UMC Fisheye vs Olympus 8mm F1.8 Fisheye PRO
Construction
Aperture Blades
9 blades
7 blades, Circular
Colors
Black
Black
Form Factor
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
MFT
MFT
MFT
Lens Barrel
DoF scale
Physical aperture ring, Distance scale
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Material
Magnesium alloy
Motor
Stepper motor
Stepper motor
Optical Formula | Elements
15 elements
9 elements
17 elements
Optical Formula | Groups
11 groups
7 groups
15 groups
Optical Formula | Special Glass
1 Super ED, 3 ED, 1 ED-DSA, 1 EDA, 1 Super HR, 1 aspherical groups
1 aspherical, 3 super ED, 2 ED, 1 super HR, 2 HR lenses groups
Dimensions
Filter Diameter
62 mm / 2.44 in
Size | Diameter
68 mm / 2.68 in
60 mm / 2.36 in
62 mm / 2.44 in
Size | Length
87 mm / 3.43 in
48 mm / 1.89 in
80 mm / 3.15 in
Weight
390 g / 13.78 oz
197 g / 6.96 oz
314 g / 11.10 oz
Function
Angle Of View
65.0° Diagonal | 55.8° Horizontal | 38.9° Vertical
180° Diagonal (fisheye)
180° Diagonal (fisheye)
Aperture
f/1.2 ~ f/16
f/3.5 ~ f/22
f/1.8 ~ f/22
Autofocus
Yes
No
Yes
Crop Factor
2.0
2.0
2.0
Focal Length
17 mm
7.5 mm
8 mm
Focal Length (35mm Equivalent)
34.0 mm
15.0 mm
16.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
Yes
No
Yes
Performance
Max Magnification
0.15x
0.2x
Min Focus Distance
200 mm / 7.87 in
90 mm / 3.54 in
120 mm / 4.72 in
Production
Accessory
Lens Hood: LH-66C (supplied)
Lens Hood: Built-in petal-type hood (supplied)
Lens hood included
Debut
2017-10-25
2011-09-05
2015-05-12
Reviews
Neofiliac score
76%
50%
67%
Pros
- Bright maximum aperture
- Weather-sealed
- Very sharp
- Very light and compact
- 180° FOV
- 180° FOV
- Weather-sealed
- Beautifully constructed
Cons
- Rather expensive
- Lacks front filter thread
- Lacks weather sealing
- Priced higher than full-frame fisheyes
- Lacks front filter thread
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