Compare Samyang 8mm F2.8 UMC Fisheye II vs Pentax-DA 10-17mm F3.5-4.5 vs Pentax-DA 11-18mm F2.8
Construction
Aperture Blades
6 blades
6 blades
Colors
Silver, black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Ultra Wide-Angle Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Physical aperture ring, Distance scale
Distance scale
Distance scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Samsung NX-mount, Sony E-mount
Pentax K-mount
Pentax K-mount
Motor
Screw drive from camera
Optical Formula | Elements
11 elements
10 elements
Optical Formula | Groups
8 groups
8 groups
Optical Formula | Special Glass
2 aspherical + 3 ED, Ultra Multi Coating groups
ED element, HD + Super Protective coatings groups
Dimensions
Size | Diameter
60 mm / 2.36 in
68 mm / 2.68 in
Size | Length
65 mm / 2.56 in
70 mm / 2.76 in
Weight
265 g / 9.36 oz
317 g / 11.20 oz
Function
Angle Of View
180° Diagonal (fisheye)
180° Diagonal (wide) ~ 100° Diagonal
105.4° Diagonal | 95.0° Horizontal | 72.1° Vertical (wide) ~ 77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (tele)
Aperture
f/2.8 ~ f/22
f/3.5–4.5 ~ f/22–32
f/2.8
Autofocus
No
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
8 mm
10 mm ~ 17 mm
11 mm ~ 18 mm
Focal Length (35mm Equivalent)
12.0 mm
15.0 mm ~ 25.5 mm
16.5 mm ~ 27.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.39x
Min Focus Distance
300 mm / 11.81 in
140 mm / 5.51 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2014-03-21
2019-07-08
2017-10-26
Reviews
Neofiliac score
31%
31%
40%
Pros
- 180° FOV
- Reasonably well built
- Ultra-wide fisheye offers unique creative possibilities
- Good build quality
- Good center resolution
Cons
- Lacks front filter thread
- Lacks weather sealing
- Lacks front filter thread
- External zoom without zoom lock
- Lacks weather sealing
- Not the strongest optical performance
- Lacks front filter thread
- Expensive for an APS-C wide-angle zoom
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