Compare Samyang 20mm F1.8 ED AS UMC vs Samyang 135mm F2.0 ED UMC vs Canon RF 85mm F1.2
Construction
Aperture Blades
7 blades
9 blades
9 blades, Circular aperture blades
Form Factor
Ultra Wide-Angle Prime Lens
Medium Telephoto Prime Lens
Short Telephoto 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, 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 RF-mount
Motor
Ring-type ultrasonic
Optical Formula | Elements
13 elements
11 elements
13 elements
Optical Formula | Groups
12 groups
7 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 ED element, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
82 mm / 3.23 in
Size | Diameter
83 mm / 3.27 in
82 mm / 3.23 in
103 mm / 4.06 in
Size | Length
88 mm / 3.46 in
122 mm / 4.80 in
117 mm / 4.61 in
Weight
497 g / 17.56 oz
830 g / 29.33 oz
1195 g / 42.23 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
18.2° Diagonal | 15.2° Horizontal | 10.2° Vertical
28.6° Diagonal | 23.9° Horizontal | 16.1° Vertical
Aperture
f/1.8 ~ f/22
f/2 ~ f/22
f/1.2
Autofocus
No
No
Yes
Focal Length
20 mm
135 mm
85 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Yes
Performance
Min Focus Distance
200 mm / 7.87 in
800 mm / 31.50 in
850 mm / 33.46 in
Production
Accessory
Lens hood included
Lens hood included
Lens Hood: ET-89 (sold separately)
Debut
2016-08-08
2015-01-12
2019-02-14
Reviews
Neofiliac score
59%
50%
71%
Pros
- Rather affordable
- Smooth rendering
- Good resolution
- Exceptionally sharp
- Very bright maximum aperture
- Weather-sealed
- Smooth bokeh
Cons
- Lacks weather sealing
- Not the highest grade of build
- On the heavy side
- Lacks weather sealing
- Hard to MF at this focal length
- On the heavy side
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