Compare Samyang 135mm F2.0 ED UMC vs Samyang 20mm F1.8 ED AS UMC vs Canon EF 50mm F1.8 STM
Construction
Aperture Blades
9 blades
7 blades
7 blades, Circular blades
Colors
Black
Form Factor
Medium Telephoto Prime Lens
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Lens Mount
Canon EF-mount, Canon EF-M-mount, Micro Four Thirds-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, 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
11 elements
13 elements
6 elements
Optical Formula | Groups
7 groups
12 groups
5 groups
Optical Formula | Special Glass
1 ED element, Ultra Multi Coating groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
49 mm / 1.93 in
Size | Diameter
82 mm / 3.23 in
83 mm / 3.27 in
69 mm / 2.72 in
Size | Length
122 mm / 4.80 in
88 mm / 3.46 in
39 mm / 1.54 in
Weight
830 g / 29.33 oz
497 g / 17.56 oz
159 g / 5.62 oz
Function
Angle Of View
18.2° Diagonal | 15.2° Horizontal | 10.2° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/2 ~ f/22
f/1.8 ~ f/22
f/1.8 ~ f/22
Autofocus
No
No
Yes
Focal Length
135 mm
20 mm
50 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
No
Performance
Max Magnification
0.21x
Min Focus Distance
800 mm / 31.50 in
200 mm / 7.87 in
350 mm / 13.78 in
Production
Accessory
Lens hood included
Lens hood included
Lens Hood: ES-68 (sold separately)
Debut
2015-01-12
2016-08-08
2015-05-11
Reviews
Neofiliac score
50%
59%
71%
Pros
- Smooth rendering
- Good resolution
- Rather affordable
- Compact and lightweight
- Rather compelling image quality
- Great price
Cons
- On the heavy side
- Lacks weather sealing
- Hard to MF at this focal length
- Lacks weather sealing
- Not the highest grade of build
- Lens hood not included
- Lacks weather sealing
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