Compare Samyang 20mm F1.8 ED AS UMC vs Tamron 20mm F/2.8 vs Tamron 24mm F/2.8
Construction
Aperture Blades
7 blades
7 blades
7 blades
Colors
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Wide-Angle 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
Sony E-mount
Sony E-mount
Motor
Micromotor
Micromotor
Optical Formula | Elements
13 elements
10 elements
10 elements
Optical Formula | Groups
12 groups
9 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Low-dispersion and aspherical elements + BBAR and fluorine coatings groups
Low-dispersion and aspherical elements + BBAR and fluorine coatings groups
Dimensions
Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
73 mm / 2.87 in
73 mm / 2.87 in
Size | Length
88 mm / 3.46 in
64 mm / 2.52 in
64 mm / 2.52 in
Weight
497 g / 17.56 oz
220 g / 7.77 oz
215 g / 7.60 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical
Aperture
f/1.8 ~ f/22
f/2.8
f/2.8
Autofocus
No
Yes
Yes
Focal Length
20 mm
20 mm
24 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Yes
Performance
Max Magnification
0.5x
0.5x
Min Focus Distance
200 mm / 7.87 in
110 mm / 4.33 in
120 mm / 4.72 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2016-08-08
2019-10-23
2019-10-23
Model Name
F050
F051
Reviews
Neofiliac score
59%
86%
78%
Pros
- Rather affordable
- Compact and lightweight
- Weather-sealed
- 1:2 maximum reproduction
- Very close focusing distance
- Good color rendition
- Sharp from f/2.8
- 0.5x reproduction
- Light in the hand
- Weather-sealed
Cons
- Lacks weather sealing
- Not the highest grade of build
- Noisy AF
- Not the sharpest
- Slow autofocus
- High distortion
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