Compare Samyang 20mm F1.8 ED AS UMC vs Laowa 25mm f/2.8 2.5-5X Ultra Macro vs Laowa 100mm f/2.8 2X Ultra Macro
Construction
Aperture Blades
7 blades
8 blades
13 blades, Nikon and Pentax mounts have 7 aperture blades.
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Canon EF-mount, Canon EF-M-mount, Fujifilm X-mount, Micro Four Thirds-mount, Nikon F-mount, Pentax K-mount, Samsung NX-mount, Sony A-mount, Sony E-mount
Canon EF-mount, Canon RF-mount, Leica L-mount, Nikon F-mount, Nikon Z-mount, Pentax K-mount, Sony E-mount
Canon EF-mount, Canon RF-mount, Leica L-mount, Nikon F-mount, Nikon Z-mount, Pentax K-mount, Sony E-mount
Optical Formula | Elements
13 elements
8 elements
12 elements
Optical Formula | Groups
12 groups
6 groups
10 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 low-dispersion element groups
Dimensions
Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
82 mm / 3.23 in
72 mm / 2.83 in
Size | Length
88 mm / 3.46 in
65 mm / 2.56 in
125 mm / 4.92 in
Weight
497 g / 17.56 oz
400 g / 14.13 oz
638 g / 22.54 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
24.4° Diagonal | 20.4° Horizontal | 13.7° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/16
f/2.8 ~ f/22
Autofocus
No
No
No
Focal Length
20 mm
25 mm
100 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
No
Performance
Max Magnification
5x
2x
Min Focus Distance
200 mm / 7.87 in
170 mm / 6.69 in
250 mm / 9.84 in
Production
Accessory
Lens hood included
Lens hood sold separately
Debut
2016-08-08
2018-03-07
2018-04-20
Made In
China
China
Reviews
Neofiliac score
59%
31%
59%
Pros
- Rather affordable
- Exceptional maximum magnification
- Optional LED ring light and tripod collar available
- High 2x maximum magnification
- Apochromatic design
Cons
- Lacks weather sealing
- Not the highest grade of build
- Not stabilized
- No lens hood available
- Lacks weather sealing
- Lacks weather sealing
- Quite long, though not expectedly so
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