Compare Samyang 20mm F1.8 ED AS UMC vs 7Artisans M35mm F5.6 vs 7Artisans M28mm F1.4
Construction
Aperture Blades
7 blades
N/A (fixed aperture)
13 blades
Colors
Black on Black / Bronze on Black / Black on Silver / Bronze on Silver
Black
Form Factor
Ultra Wide-Angle Prime Lens
Manual focus, Fixed aperture, Prime lens
Manual focus lens, 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
M-mount
M-mount
Optical Formula | Elements
13 elements
5 elements
11 elements
Optical Formula | Groups
12 groups
4 groups
9 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
1x aspherical, 2x ED groups
Dimensions
Filter Diameter
77 mm / 3.03 in
N/A
52 mm
Size | Diameter
83 mm / 3.27 in
Size | Length
88 mm / 3.46 in
Weight
497 g / 17.56 oz
128 g
488 g
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
63°
75°
Aperture
f/1.8 ~ f/22
F/5.6 fixed aperture
F/1.4 ~ f/16
Autofocus
No
Focal Length
20 mm
35 mm
28 mm
Focus Type
Internal
Image Stabilization
No
N/A
N/A
Weather Resistance
No
Performance
Min Focus Distance
200 mm / 7.87 in
30 cm
70 cm
Production
Accessory
Lens hood included
Debut
2016-08-08
2021-03
2018-11
Made In
China
China
Reviews
Neofiliac score
59%
Pros
- Rather affordable
- Compact and light
- Very good sharpness
- Dust and splash protection
Cons
- Lacks weather sealing
- Not the highest grade of build
- Very high sensitivity to flare
- Occasional ghosting
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