Compare Samyang 20mm F1.8 ED AS UMC vs Nikon 500mm F5.6E vs Tokina SZX 400mm F8 Reflex
Construction
Aperture Blades
7 blades
9 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Super Telephoto Prime Lens
Super Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale
Tripod collar
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
Nikon F-mount
Canon EF-mount, Micro Four Thirds-mount, Nikon F-mount, Sony E-mount
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Optical Formula | Elements
13 elements
19 elements
6 elements
Optical Formula | Groups
12 groups
11 groups
5 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1 PF + 3 ED elements, Nano Crystal and fluorine coatings groups
Dimensions
Filter Diameter
77 mm / 3.03 in
95 mm / 3.74 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
106 mm / 4.17 in
74 mm / 2.91 in
Size | Length
88 mm / 3.46 in
237 mm / 9.33 in
77 mm / 3.03 in
Weight
497 g / 17.56 oz
1460 g / 51.59 oz
355 g / 12.54 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
5.0° Diagonal | 4.1° Horizontal | 2.7° Vertical
6.2° Diagonal | 5.2° Horizontal | 3.4° Vertical
Aperture
f/1.8 ~ f/22
f/5.6 ~ f/32
f/8 ~ f/8
Autofocus
No
Yes
No
Focal Length
20 mm
500 mm
400 mm
Focus Type
Internal
Internal
Image Stabilization
No
Yes (4 stops)
No
Weather Resistance
No
Yes
No
Performance
Max Magnification
0.18x
0.4x
Min Focus Distance
200 mm / 7.87 in
3000 mm / 118.11 in
1150 mm / 45.28 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2018-06-14
2020-07-19
Reviews
Neofiliac score
59%
50%
40%
Pros
- Rather affordable
- Optically stabilized
- Weather-sealed
- Comes with a tripod collar
- Great optical performance
- Solid build
- Very compact for 400mm
- Very affordable
Cons
- Lacks weather sealing
- Not the highest grade of build
- Dark maximum aperture
- Large physical size with large diameter and long barrel
- On the heavy side
- Dark maximum aperture
- Lacks weather sealing
- Poor image quality
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