Compare Samyang 20mm F1.8 ED AS UMC vs Sigma 56mm F1.4 DC DN vs SIGMA 85mm F1.4 DG DN
Construction
Aperture Blades
7 blades
9 blades
11 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Short Telephoto Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
APS-C
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-M-mount, Leica L-mount, Micro Four Thirds-mount, Sony E-mount
Leica L-mount, Sony E-mount
Material
Magnesium alloy
Motor
Stepper motor
Stepper motor
Optical Formula | Elements
13 elements
10 elements
11 elements
Optical Formula | Groups
12 groups
6 groups
15 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 SLD + 2 aspherical elements groups
1 aspherical + 5 SLD elements groups
Dimensions
Filter Diameter
77 mm / 3.03 in
55 mm / 2.17 in
77 mm / 3.03 in
Size | Diameter
83 mm / 3.27 in
67 mm / 2.64 in
83 mm / 3.27 in
Size | Length
88 mm / 3.46 in
60 mm / 2.36 in
94 mm / 3.70 in
Weight
497 g / 17.56 oz
281 g / 9.93 oz
630 g / 22.26 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
28.9° Diagonal | 24.2° Horizontal | 16.3° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
Aperture
f/1.8 ~ f/22
f/1.4 ~ f/16
f/1.4 ~ f/16
Autofocus
No
Yes
Yes
Crop Factor
1.5
Focal Length
20 mm
56 mm
85 mm
Focal Length (35mm Equivalent)
84.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Yes
Performance
Max Magnification
0.14x
0.12x
Min Focus Distance
200 mm / 7.87 in
500 mm / 19.69 in
850 mm / 33.46 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2020-06-18
2020-08-05
Made In
Japan
Japan
Reviews
Neofiliac score
59%
91%
98%
Pros
- Rather affordable
- Good sharpness
- Bright maximum aperture
- Weather-sealed
- Excellent autofocus
- Great build quality
- Good color rendition
- Bright maximum aperture
- Weather-sealed
- Comes with physical aperture ring
Cons
- Lacks weather sealing
- Not the highest grade of build
- Very light and compact
- Vignetting at f/1.4
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