Compare Samyang 20mm F1.8 ED AS UMC vs Canon EF 16-35mm F2.8L III vs Canon RF 14-35mm F4
Construction
Aperture Blades
7 blades
9 blades
9 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Zoom Lens
Wide-Angle Zoom Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Distance 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
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Nano ultrasonic
Optical Formula | Elements
13 elements
16 elements
16 elements
Optical Formula | Groups
12 groups
11 groups
12 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 dual-surface aspherical, 1 aspherical + fluorine, Air Sphere, Sub-wavelength Structure coatings groups
3 UD + 3 aspherical elements, Super Spectra + Sub-wavelength Structure + Air Sphere coatings groups
Dimensions
Filter Diameter
77 mm / 3.03 in
82 mm / 3.23 in
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
89 mm / 3.50 in
84 mm / 3.31 in
Size | Length
88 mm / 3.46 in
128 mm / 5.04 in
100 mm / 3.94 in
Weight
497 g / 17.56 oz
790 g / 27.92 oz
540 g / 19.08 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) ~ 63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical (tele)
114.2° Diagonal | 104.3° Horizontal | 81.2° Vertical (wide) ~ 63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical (tele)
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
f/4 ~ f/22
Autofocus
No
Yes
Yes
Focal Length
20 mm
16 mm ~ 35 mm
14 mm ~ 35 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Yes (5.5 stops)
Weather Resistance
No
Yes
Yes
Zoom Type
Internal zoom
Performance
Max Magnification
0.25x
0.38x
Min Focus Distance
200 mm / 7.87 in
280 mm / 11.02 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens Hood: EW-88D (supplied)
Lens hood included
Debut
2016-08-08
2016-08-25
2021-06-29
Reviews
Neofiliac score
59%
80%
71%
Pros
- Rather affordable
- Superb sharpness across the frame
- Internal zoom
- Weather-sealed
- Beautifully crafted
- Superb image quality
- Low distortion
- Optically stabilized
- Weather-sealed
- Accepts front filters
- Wider focal range than the competition / DSLRs
Cons
- Lacks weather sealing
- Not the highest grade of build
- A bit long
- Dark maximum aperture
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