Compare Samyang 20mm F1.8 ED AS UMC vs Canon RF 15-35mm F2.8 vs Canon RF 24-105mm F4-7.1
Construction
Aperture Blades
7 blades
9 blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Zoom Lens
Standard Zoom Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, 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 RF-mount
Canon RF-mount
Material
Magnesium alloy
Motor
Nano ultrasonic
Stepper motor
Optical Formula | Elements
13 elements
16 elements
11 elements
Optical Formula | Groups
12 groups
12 groups
13 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
3 aspherical + 2 UD elements groups
Dimensions
Filter Diameter
77 mm / 3.03 in
82 mm / 3.23 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
89 mm / 3.50 in
77 mm / 3.03 in
Size | Length
88 mm / 3.46 in
127 mm / 5.00 in
89 mm / 3.50 in
Weight
497 g / 17.56 oz
840 g / 29.68 oz
395 g / 13.96 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
Aperture
f/1.8 ~ f/22
f/2.8
f/4–7.1 ~ f/40
Autofocus
No
Yes
Yes
Focal Length
20 mm
15 mm ~ 35 mm
24 mm ~ 105 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
Yes (5 stops)
Yes (5 stops)
Weather Resistance
No
Yes
No
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.21x
0.5x
Min Focus Distance
200 mm / 7.87 in
280 mm / 11.02 in
130 mm / 5.12 in
Production
Accessory
Lens hood included
Lens hood included
Lens Hood: EW-73D (sold separately)
Debut
2016-08-08
2019-02-14
2020-02-12
Reviews
Neofiliac score
59%
71%
43%
Pros
- Rather affordable
- 1mm wider than the EF-mount version
- Low distortion
- Unique image stabilization
- Weather-sealed
- Good sharpness
- Quite compact for what it is
- Optically stabilized
- Excellent zoom range for everyday use
Cons
- Lacks weather sealing
- Not the highest grade of build
- On the heavy side
- External zoom without zoom lock
- Dark maximum aperture
- External zoom without zoom lock
- Lens hood not included
- Lacks weather sealing
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