Compare Samyang 7.5mm F3.5 UMC Fisheye vs Olympus 8mm F1.8 Fisheye PRO vs Olympus 25mm F1.8
Construction
Aperture Blades
7 blades, Circular
7 blades, Circular aperture diaphragm
Colors
Black
Black or Silver
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
MFT
MFT
MFT
Lens Barrel
Physical aperture ring, Distance scale
Lens Mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Motor
Stepper motor
Stepper motor
Optical Formula | Elements
9 elements
17 elements
9 elements
Optical Formula | Groups
7 groups
15 groups
7 groups
Optical Formula | Special Glass
1 aspherical, 3 super ED, 2 ED, 1 super HR, 2 HR lenses groups
2 aspherical elements groups
Dimensions
Filter Diameter
46 mm / 1.81 in
Size | Diameter
60 mm / 2.36 in
62 mm / 2.44 in
56 mm / 2.20 in
Size | Length
48 mm / 1.89 in
80 mm / 3.15 in
41 mm / 1.61 in
Weight
197 g / 6.96 oz
314 g / 11.10 oz
136 g / 4.81 oz
Function
Angle Of View
180° Diagonal (fisheye)
180° Diagonal (fisheye)
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
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
8 mm
25 mm
Focal Length (35mm Equivalent)
15.0 mm
16.0 mm
50.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.2x
0.12x
Min Focus Distance
90 mm / 3.54 in
120 mm / 4.72 in
240 mm / 9.45 in
Production
Accessory
Lens Hood: Built-in petal-type hood (supplied)
Lens hood included
Lens Hood: LH-49B (supplied)
Debut
2011-09-05
2015-05-12
2014-01-29
Reviews
Neofiliac score
50%
67%
76%
Pros
- Very light and compact
- 180° FOV
- 180° FOV
- Weather-sealed
- Beautifully constructed
- Compact and lightweight
Cons
- Lacks front filter thread
- Lacks weather sealing
- Priced higher than full-frame fisheyes
- Lacks front filter thread
- Not the sharpest normal lens
- Not competitively priced
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