Compare Samyang 20mm F1.8 ED AS UMC vs Samyang 10mm F2.8 ED AS NCS CS vs Tamron 24mm F/2.8
Construction
Aperture Blades
7 blades
6 blades, Manual aperture setting via lens ring
7 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Wide-Angle Prime Lens
Image Size
Full-Frame
APS-C
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-M-mount, Canon EF-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
Sony E-mount
Motor
Micromotor
Optical Formula | Elements
13 elements
14 elements
10 elements
Optical Formula | Groups
12 groups
10 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
2 aspherical elements, 1 ED glass element groups
Low-dispersion and aspherical elements + BBAR and fluorine coatings groups
Dimensions
Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
Size | Diameter
83 mm / 3.27 in
86 mm / 3.39 in
73 mm / 2.87 in
Size | Length
88 mm / 3.46 in
77 mm / 3.03 in
64 mm / 2.52 in
Weight
497 g / 17.56 oz
580 g / 20.49 oz
215 g / 7.60 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical
Aperture
f/1.8 ~ f/22
f/2.8 ~ f/22
f/2.8
Autofocus
No
No
Yes
Crop Factor
1.5
Focal Length
20 mm
10 mm
24 mm
Focal Length (35mm Equivalent)
15.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
Yes
Performance
Max Magnification
0.5x
Min Focus Distance
200 mm / 7.87 in
250 mm / 9.84 in
120 mm / 4.72 in
Production
Accessory
Lens hood included
Lens Hood: Integrated hood (supplied)
Lens hood included
Debut
2016-08-08
2013-12-06
2019-10-23
Model Name
F051
Reviews
Neofiliac score
59%
40%
78%
Pros
- Rather affordable
- One of the widest rectilinear lens for APS-C
- Reasonable IQ
- Bright f/2.8 aperture
- Sharp from f/2.8
- 0.5x reproduction
- Light in the hand
- Weather-sealed
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks front filter thread
- Slow autofocus
- High distortion
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