Compare Samyang 8mm F2.8 UMC Fisheye II vs Samyang 10mm F2.8 ED AS NCS CS vs Pentax-FA 31mm F1.8
Construction
Aperture Blades
6 blades
6 blades, Manual aperture setting via lens ring
9 blades
Colors
Silver, black
Black, silver
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
APS-C
APS-C
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Samsung NX-mount, Sony E-mount
Canon EF-M-mount, Canon EF-mount, Micro Four Thirds-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Pentax K-mount
Material
Aluminum
Motor
Screw drive from camera
Optical Formula | Elements
11 elements
14 elements
9 elements
Optical Formula | Groups
8 groups
10 groups
7 groups
Optical Formula | Special Glass
2 aspherical + 3 ED, Ultra Multi Coating groups
2 aspherical elements, 1 ED glass element groups
HD + Super Protect coatings groups
Dimensions
Filter Diameter
58 mm / 2.28 in
Size | Diameter
60 mm / 2.36 in
86 mm / 3.39 in
65 mm / 2.56 in
Size | Length
65 mm / 2.56 in
77 mm / 3.03 in
69 mm / 2.72 in
Weight
265 g / 9.36 oz
580 g / 20.49 oz
341 g / 12.05 oz
Function
Angle Of View
180° Diagonal (fisheye)
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical
69.9° Diagonal | 60.3° Horizontal | 42.3° Vertical
Aperture
f/2.8 ~ f/22
f/2.8 ~ f/22
f/1.8 ~ f/22
Autofocus
No
No
Yes
Crop Factor
1.5
1.5
Focal Length
8 mm
10 mm
31 mm
Focal Length (35mm Equivalent)
12.0 mm
15.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.16x
Min Focus Distance
300 mm / 11.81 in
250 mm / 9.84 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: Integrated hood (supplied)
Lens hood included
Debut
2014-03-21
2013-12-06
2021-02-24
Reviews
Neofiliac score
31%
40%
50%
Pros
- 180° FOV
- Reasonably well built
- One of the widest rectilinear lens for APS-C
- Reasonable IQ
- Bright f/2.8 aperture
- Comes with physical aperture ring
- Beautifully built
Cons
- Lacks front filter thread
- Lacks weather sealing
- Lacks front filter thread
- Only f/1.8 for the price
- Lacks weather sealing
- Unusual focal length
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