Compare Samyang 20mm F1.8 ED AS UMC vs Canon EF-M 15-45mm F3.5-6.3 vs Canon RF-S 18-45mm F4.5-6.3
Construction
Aperture Blades
7 blades
7 blades
7 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
Full-Frame
APS-C
APS-C
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 EF-M-mount
Canon RF-mount
Motor
Stepper motor
Stepper motor
Optical Formula | Elements
13 elements
10 elements
7 elements
Optical Formula | Groups
12 groups
9 groups
7 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Two aspherical elements groups
Dimensions
Filter Diameter
77 mm / 3.03 in
49 mm / 1.93 in
49 mm / 1.93 in
Size | Diameter
83 mm / 3.27 in
61 mm / 2.40 in
69 mm / 2.72 in
Size | Length
88 mm / 3.46 in
45 mm / 1.77 in
44 mm / 1.73 in
Weight
497 g / 17.56 oz
130 g / 4.59 oz
130 g / 4.59 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 33.5° Diagonal | 28.1° Horizontal | 18.9° Vertical (tele)
73.9° Diagonal | 64.0° Horizontal | 45.2° Vertical (wide) ~ 33.5° Diagonal | 28.1° Horizontal | 18.9° Vertical (tele)
Aperture
f/1.8 ~ f/22
f/3.5–6.3 ~ f/22–40
f/4.5–6.3 ~ f/22
Autofocus
No
Yes
Yes
Crop Factor
1.6
1.6
Focal Length
20 mm
15 mm ~ 45 mm
18 mm ~ 45 mm
Focal Length (35mm Equivalent)
24.0 mm ~ 72.0 mm
28.8 mm ~ 72.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
Yes
Yes (7 stops)
Weather Resistance
No
No
No
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.16x
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens Hood: Canon EW-53 (sold separately)
Debut
2016-08-08
2015-10-13
2022-05-24
Reviews
Neofiliac score
59%
71%
19%
Pros
- Rather affordable
- Optically stabilized
- Compact and lightweight
- Zoom lock available
- Optically stabilized
- Short barrel
- Light in the hand
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks weather sealing
- Mediocre build and optical performance
- Dark maximum aperture
- External zoom without zoom lock
- Lens hood not included
- Lacks weather sealing
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