Compare Samyang 20mm F1.8 ED AS UMC vs Tokina SZX 400mm F8 Reflex vs Tokina Firin 100mm F2.8
Construction
Aperture Blades
7 blades
9 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Super Telephoto Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Physical aperture ring, Distance 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, Micro Four Thirds-mount, Nikon F-mount, Sony E-mount
Sony E-mount
Optical Formula | Elements
13 elements
6 elements
9 elements
Optical Formula | Groups
12 groups
5 groups
8 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Multi-coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
55 mm / 2.17 in
Size | Diameter
83 mm / 3.27 in
74 mm / 2.91 in
74 mm / 2.91 in
Size | Length
88 mm / 3.46 in
77 mm / 3.03 in
123 mm / 4.84 in
Weight
497 g / 17.56 oz
355 g / 12.54 oz
570 g / 20.14 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
6.2° Diagonal | 5.2° Horizontal | 3.4° Vertical
24.4° Diagonal | 20.4° Horizontal | 13.7° Vertical
Aperture
f/1.8 ~ f/22
f/8 ~ f/8
f/2.8 ~ f/32
Autofocus
No
No
Yes
Focal Length
20 mm
400 mm
100 mm
Focus Type
Internal
Extending front
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.4x
1x
Min Focus Distance
200 mm / 7.87 in
1150 mm / 45.28 in
300 mm / 11.81 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2020-07-19
2019-04-21
Reviews
Neofiliac score
59%
40%
68%
Pros
- Rather affordable
- Very compact for 400mm
- Very affordable
- 1:1 maximum magnification
- Solid construction
- Good optical performance
Cons
- Lacks weather sealing
- Not the highest grade of build
- Dark maximum aperture
- Lacks weather sealing
- Poor image quality
- Slow autofocus
- Not stabilized
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