Compare Samyang 20mm F1.8 ED AS UMC vs Laowa 25mm f/2.8 2.5-5X Ultra Macro vs Panasonic S 18mm F1.8
Construction
Aperture Blades
7 blades
8 blades
9 blades, Circulate aperture desigm
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring
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
Leica L-mount
Material
Polycarbonate
Motor
Stepper motor
Optical Formula | Elements
13 elements
8 elements
13 elements
Optical Formula | Groups
12 groups
6 groups
12 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 low-dispersion element groups
3 Aspheric, 1 UED, 3 ED, 1 UHR 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
74 mm / 2.91 in
Size | Length
88 mm / 3.46 in
65 mm / 2.56 in
82 mm / 3.23 in
Weight
497 g / 17.56 oz
400 g / 14.13 oz
340 g / 12.01 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/16
f/1.8 ~ f/16
Autofocus
No
No
Yes
Focal Length
20 mm
25 mm
18 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
5x
0.2x
Min Focus Distance
200 mm / 7.87 in
170 mm / 6.69 in
180 mm / 7.09 in
Production
Accessory
Lens hood included
Lens hood sold separately
Lens hood included
Debut
2016-08-08
2018-03-07
2022-09-07
Made In
China
Reviews
Neofiliac score
59%
31%
68%
Pros
- Rather affordable
- Exceptional maximum magnification
- Optional LED ring light and tripod collar available
- Rather lightweight
- Decent image quality
Cons
- Lacks weather sealing
- Not the highest grade of build
- Not stabilized
- No lens hood available
- Lacks weather sealing
- Not very competitive
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