Compare Voigtlander 21mm F1.8 Ultron vs Samyang 20mm F1.8 ED AS UMC vs Voigtlander Ultron 28mm F2
Variants
Type I
Type II
Construction
Aperture Blades
10 blades
7 blades
10 blades, straight cut
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Manual-focus prime lens for rangefinder cameras
Image Size
Full-Frame
Full-Frame
Full-frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Physical aperture ring, Distance scale
Lens Mount
Leica M-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 bayonet (VM)
Material
Metal barrel, metal mount
Optical Formula | Elements
13 elements
13 elements
10 elements
Optical Formula | Groups
11 groups
12 groups
7 groups
Optical Formula | Special Glass
Aspherical element groups
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
58 mm / 2.28 in
77 mm / 3.03 in
39 mm
Size | Diameter
62 mm / 2.44 in
83 mm / 3.27 in
Size | Length
92 mm / 3.62 in
88 mm / 3.46 in
36 mm
Weight
412 g / 14.56 oz
497 g / 17.56 oz
Function
Angle Of View
91.7° Diagonal | 81.2° Horizontal | 59.5° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
74.51°
Aperture
f/1.8 ~ f/22
f/1.8 ~ f/22
f/2 ~ f/22
Autofocus
No
No
Focal Length
21 mm
20 mm
28 mm
Focus Type
Internal
Image Stabilization
No
Weather Resistance
No
Performance
Min Focus Distance
500 mm / 19.69 in
200 mm / 7.87 in
0.5 m (Rangefinder coupling ∞ ~ 0.7 m)
Production
Accessory
Lens Hood: Non-detachable hood (supplied)
Lens hood included
Lens hood LH-4N or LH-12, optional
Debut
2012-09-17
2016-08-08
2021
Made In
Japan
Japan
Reviews
Neofiliac score
88%
59%
Pros
- Solid all-metal construction
- Very sharp
- Great sunstar
- Quite bright aperture
- Rather affordable
- Amazing build quality
- Very sharp
- Easy to focus
Cons
- Lacks weather sealing
- Not the highest grade of build
- Does not work well with thick filter stack
- Vignetting at f/2
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