Compare Samyang 21mm F1.4 ED AS UMC CS vs Olympus 9mm F8 Fisheye vs Samyang 7.5mm F3.5 UMC Fisheye
Construction
Aperture Blades
9 blades, Circular blades
Colors
Black
Form Factor
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
MFT
MFT
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Sony E-mount
Micro Four Thirds-mount
Micro Four Thirds-mount
Material
Plastic
Optical Formula | Elements
8 elements
5 elements
9 elements
Optical Formula | Groups
7 groups
4 groups
7 groups
Optical Formula | Special Glass
3 aspherical and 2 ED elements + Ultra Multi Coating groups
2 aspherical elements groups
Dimensions
Filter Diameter
58 mm / 2.28 in
Size | Diameter
64 mm / 2.52 in
56 mm / 2.20 in
60 mm / 2.36 in
Size | Length
68 mm / 2.68 in
13 mm / 0.51 in
48 mm / 1.89 in
Weight
275 g / 9.72 oz
30 g / 1.06 oz
197 g / 6.96 oz
Function
Angle Of View
69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
180° Diagonal (fisheye)
Aperture
f/1.4 ~ f/22
f/8 ~ f/8
f/3.5 ~ f/22
Autofocus
No
No
No
Crop Factor
1.5
2.0
2.0
Focal Length
21 mm
9 mm
7.5 mm
Focal Length (35mm Equivalent)
31.5 mm
18.0 mm
15.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.046x
Min Focus Distance
280 mm / 11.02 in
200 mm / 7.87 in
90 mm / 3.54 in
Production
Accessory
Lens hood included
Lens hood sold separately
Lens Hood: Built-in petal-type hood (supplied)
Debut
2015-09-21
2014-01-29
2011-09-05
Reviews
Neofiliac score
50%
48%
50%
Pros
- Bright maximum aperture
- Very sharp
- Good color rendition
- Negligible size and weight
- Very light and compact
- 180° FOV
Cons
- Lacks weather sealing
- Dark f/8 aperture
- Lacks front filter thread
- Not a serious lens
- Lacks front filter thread
- Lacks weather sealing
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