Compare Samyang 20mm F1.8 ED AS UMC vs Laowa 25mm f/2.8 2.5-5X Ultra Macro vs Canon RF 85 F1.2L USM DS
Construction
Aperture Blades
7 blades
8 blades
9 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
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 RF-mount
Motor
Ultrasonic
Optical Formula | Elements
13 elements
8 elements
13 elements
Optical Formula | Groups
12 groups
6 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 low-dispersion element groups
BR Optical elements in one location, one UD, one ground aspherical lens groups
Dimensions
Filter Diameter
77 mm / 3.03 in
82 mm / 3.23 in
Size | Diameter
83 mm / 3.27 in
82 mm / 3.23 in
103 mm / 4.06 in
Size | Length
88 mm / 3.46 in
65 mm / 2.56 in
117 mm / 4.61 in
Weight
497 g / 17.56 oz
400 g / 14.13 oz
1195 g / 42.23 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
81.8° Diagonal | 71.5° Horizontal | 51.3° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/16
f/1.2
Autofocus
No
No
Yes
Focal Length
20 mm
25 mm
85 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Yes
Performance
Max Magnification
5x
0.12x
Min Focus Distance
200 mm / 7.87 in
170 mm / 6.69 in
850 mm / 33.46 in
Production
Accessory
Lens hood included
Lens hood sold separately
Debut
2016-08-08
2018-03-07
2019-02-14
Made In
China
Reviews
Neofiliac score
59%
31%
80%
Pros
- Rather affordable
- Exceptional maximum magnification
- Optional LED ring light and tripod collar available
- Very bright maximum aperture
- Smooth bokeh
- Very high sharpness
- Weather-sealed
- Great for portrait photography
Cons
- Lacks weather sealing
- Not the highest grade of build
- Not stabilized
- No lens hood available
- Lacks weather sealing
- DS causes some loss in light transmission
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