Compare Samyang 20mm F1.8 ED AS UMC vs Voigtlander Nokton 25mm F0.95 II vs Voigtlander 40mm F1.2
Variants
Original
SE
Construction
Aperture Blades
7 blades
10 blades, Switchable stepped / stepless aperture control
10, Straight
Colors
black
Form Factor
Ultra Wide-Angle Prime Lens
Normal Prime Lens
Image Size
Full-Frame
MFT
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
Micro Four Thirds-mount
E-mount
Material
metal barrel, metal mount
Optical Formula | Elements
13 elements
11 elements
8 elements
Optical Formula | Groups
12 groups
8 groups
6 groups
Optical Formula | Special Glass
Two aspherical + 3 ED elements, Ultra Multi Coating groups
Dimensions
Filter Diameter
77 mm / 3.03 in
52 mm / 2.05 in
58 mm
Size | Diameter
83 mm / 3.27 in
61 mm / 2.40 in
Size | Length
88 mm / 3.46 in
70 mm / 2.76 in
Weight
497 g / 17.56 oz
435 g / 15.37 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
55 deg
Aperture
f/1.8 ~ f/22
f/1 ~ f/16
F/1.2 - f/22
Autofocus
No
No
Crop Factor
2.0
Focal Length
20 mm
25 mm
40 mm
Focal Length (35mm Equivalent)
50.0 mm
Focus Type
Internal
Image Stabilization
No
No
Weather Resistance
No
No
Performance
Max Magnification
1:6.2
Min Focus Distance
200 mm / 7.87 in
170 mm / 6.69 in
0.35 m
Production
Accessory
Lens hood included
Debut
2016-08-08
2014-02-12
Made In
Japan
Japan
Reviews
Neofiliac score
59%
70%
Pros
- Rather affordable
- Very bright maximum aperture
- Solid build quality
- Smooth manual operation
- Focussing on the corners gives good results across the frame
- Very sharp at f/1.2
- Focused on the outer midfield
Cons
- Lacks weather sealing
- Not the highest grade of build
- Lacks weather sealing
- Focus shift is noticeable at f8
- Focus shift can be noticeable at wide open corners
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