Compare Samyang 21mm F1.4 ED AS UMC CS vs Laowa 9mm f/2.8 Zero-D vs Laowa 17mm F4 Zero-D GFX
Construction
Aperture Blades
9 blades, Circular blades
7 blades
7 blades
Colors
Black
Black
Form Factor
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
APS-C
APS-C
Medium Format (44x33)
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Sony E-mount
Canon EF-M-mount, Fujifilm X-mount, Leica L-mount, Sony E-mount
Fujifilm G-mount
Optical Formula | Elements
8 elements
15 elements
21 elements
Optical Formula | Groups
7 groups
10 groups
14 groups
Optical Formula | Special Glass
3 aspherical and 2 ED elements + Ultra Multi Coating groups
3 ED, 2 aspherical elements + Frog Eye Coating groups
2 aspherical + 3 ED elements groups
Dimensions
Filter Diameter
58 mm / 2.28 in
49 mm / 1.93 in
86 mm / 3.39 in
Size | Diameter
64 mm / 2.52 in
60 mm / 2.36 in
77 mm / 3.03 in
Size | Length
68 mm / 2.68 in
53 mm / 2.09 in
125 mm / 4.92 in
Weight
275 g / 9.72 oz
215 g / 7.60 oz
829 g / 29.29 oz
Function
Angle Of View
69.0° Diagonal | 59.5° Horizontal | 41.7° Vertical
116.1° Diagonal | 106.3° Horizontal | 83.3° Vertical
116.4° Diagonal | 106.5° Horizontal | 83.6° Vertical
Aperture
f/1.4 ~ f/22
f/2.8 ~ f/22
f/4 ~ f/22
Autofocus
No
No
No
Crop Factor
1.5
1.5
0.8
Focal Length
21 mm
9 mm
17 mm
Focal Length (35mm Equivalent)
31.5 mm
13.5 mm
13.4 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
No
Performance
Max Magnification
0.13x
0.28x
Min Focus Distance
280 mm / 11.02 in
120 mm / 4.72 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2015-09-21
2018-03-22
2018-04-20
Made In
China
China
Reviews
Neofiliac score
50%
50%
40%
Pros
- Bright maximum aperture
- Very sharp
- Good color rendition
- Compact and light weight
- One of the widest rectilinear lens available for APS-C
- Good sharpness
- Widest rectilinear lens for G-mount medium format
- Low distortion
- Good optical performance
Cons
- Lacks weather sealing
- Lacks weather sealing
- No EXIF
- On the heavy side
- Lacks weather sealing
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