Compare Samyang 20mm F1.8 ED AS UMC vs Samyang 35mm F1.4 AS UMC vs Samyang AF 18mm F2.8
Construction
Aperture Blades
7 blades
7 blades
Form Factor
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Physical aperture ring, Distance scale, DoF 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, Nikon F-mount, Micro Four Thirds-mount, Pentax K-mount, Sony A-mount, Sony E-mount, Samsung NX-mount
Sony E-mount
Motor
Stepper motor
Optical Formula | Elements
13 elements
12 elements
9 elements
Optical Formula | Groups
12 groups
10 groups
8 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2 high-refraction glass elements1 aspherical element groups
2 HR, 3 aspherical, 3 ED elements + UMC coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
58 mm / 2.28 in
Size | Diameter
83 mm / 3.27 in
63 mm / 2.48 in
64 mm / 2.52 in
Size | Length
88 mm / 3.46 in
112 mm / 4.41 in
61 mm / 2.40 in
Weight
497 g / 17.56 oz
660 g / 23.32 oz
145 g / 5.12 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical
100.5° Diagonal | 90.0° Horizontal | 67.4° Vertical
Aperture
f/1.8 ~ f/22
f/1.4 ~ f/22
f/2.8 ~ f/22
Autofocus
No
No
Yes
Focal Length
20 mm
35 mm
18 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.09x
Min Focus Distance
200 mm / 7.87 in
300 mm / 11.81 in
250 mm / 9.84 in
Production
Accessory
Lens hood included
Debut
2016-08-08
2010-09-16
2019-08-29
Made In
Korea
Reviews
Neofiliac score
59%
68%
59%
Pros
- Rather affordable
- Bright maximum aperture
- Good level of resolution
- Light and compact
- Fast autofocus
- High contrast
- Good sharpness
Cons
- Lacks weather sealing
- Not the highest grade of build
- Quite large and heavy
- Low maximum magnification
- Lacks weather sealing
- Focus breathing
- Strong vignetting wide open
- Full plastic construction
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