Compare Samyang 20mm F1.8 ED AS UMC vs 7Artisans M50mm F1.1
Construction
Aperture Blades
7 blades
12 blades
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
Full-Frame
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
Leica M-mount
Material
Aluminum
Optical Formula | Elements
13 elements
7 elements
Optical Formula | Groups
12 groups
6 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
55 mm / 2.17 in
Size | Diameter
83 mm / 3.27 in
60 mm / 2.36 in
Size | Length
88 mm / 3.46 in
49 mm / 1.93 in
Weight
497 g / 17.56 oz
400 g / 14.13 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
Aperture
f/1.8 ~ f/22
f/1.1 ~ f/16
Autofocus
No
No
Focal Length
20 mm
50 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Performance
Min Focus Distance
200 mm / 7.87 in
700 mm / 27.56 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2016-08-08
2017-12-09
Reviews
Neofiliac score
59%
68%
Pros
- Rather affordable
- Bright maximum aperture
- Short barrel
- 12-bladed aperture produces well-defined sunstars
- Better built than most 7Artisan lenses
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks weather sealing
- Voigtlander and Zeiss have stronger alternatives
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