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Compare Samyang 20mm F1.8 ED AS UMC vs Canon EF-S 10-18mm F4.5–5.6

Construction

Aperture Blades
7 blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Image Size
Full-Frame
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-mount
Motor
Stepper motor
Optical Formula | Elements
13 elements
14 elements
Optical Formula | Groups
12 groups
11 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
UD lens element and enhanced lens coatings groups

Dimensions

Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
75 mm / 2.95 in
Size | Length
88 mm / 3.46 in
72 mm / 2.83 in
Weight
497 g / 17.56 oz
240 g / 8.48 oz

Function

Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
107.1° Diagonal | 96.7° Horizontal | 73.7° Vertical (wide) ~ 73.9° Diagonal | 64.0° Horizontal | 45.2° Vertical (tele)
Aperture
f/1.8 ~ f/22
f/4.5–5.6 ~ f/22–29
Autofocus
No
Yes
Crop Factor
1.6
Focal Length
20 mm
10 mm ~ 18 mm
Focal Length (35mm Equivalent)
16.0 mm ~ 28.8 mm
Focus Type
Internal
Internal
Image Stabilization
No
Yes
Weather Resistance
No
No
Zoom Type
Internal zoom

Performance

Max Magnification
0.15x
Min Focus Distance
200 mm / 7.87 in
220 mm / 8.66 in

Production

Accessory
Lens hood included
Lens Hood: EW-73 C (sold separately)
Debut
2016-08-08
2014-05-13

Reviews

Neofiliac score
59%
62%
Pros
  • Rather affordable
  • Optically stabilized
  • Light in the hand
  • Internal zoom
Cons
  • Lacks weather sealing
  • Not the highest grade of build
  • Dark maximum aperture
  • Lens hood not included
  • Lacks weather sealing
  • Not the best build quality
  • Not the sharpest

Price

Offers (incl. referral links)
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