Compare Sigma 50mm F1.4 DG HSM vs Sigma 20mm F1.4 DG HSM vs Nikon 20mm F1.8G
Construction
Aperture Blades
9 blades, Rounded diaphragm
9 blades, Rounded blades
7 blades, Rounded blades
Colors
Black
Form Factor
Normal Prime Lens
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Prime Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Distance scale, DoF scale
Distance scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony A-mount, Sony E-mount, Leica L-mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony E-mount, Leica L-mount
Nikon F-mount
Material
Composite
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Ultrasonic
Optical Formula | Elements
13 elements
15 elements
13 elements
Optical Formula | Groups
8 groups
11 groups
11 groups
Optical Formula | Special Glass
SLD glass elements, aspheric elements groups
Two FLD, five SLD elements + Super Multi-Layer coating groups
2 ED, 2 aspherical groups
Dimensions
Filter Diameter
77 mm / 3.03 in
77 mm / 3.03 in
Size | Diameter
85 mm / 3.35 in
91 mm / 3.58 in
83 mm / 3.27 in
Size | Length
100 mm / 3.94 in
130 mm / 5.12 in
81 mm / 3.19 in
Weight
815 g / 28.80 oz
950 g / 33.57 oz
355 g / 12.54 oz
Function
Angle Of View
46.8° Diagonal | 39.6° Horizontal | 27.0° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
Aperture
f/1.4 ~ f/16
f/1.4 ~ f/16
f/1.8 ~ f/16
Autofocus
Yes
Yes
Focal Length
50 mm
20 mm
20 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No
Performance
Max Magnification
0.18x
0.14x
0.23x
Min Focus Distance
400 mm / 15.75 in
300 mm / 11.81 in
200 mm / 7.87 in
Production
Accessory
Lens hood included
Lens Hood: HB-72 (supplied), CL-1015 soft lens case
Debut
2014-01-06
2015-10-16
2014-09-12
Made In
Japan
Japan
Reviews
Neofiliac score
74%
55%
78%
Pros
- Exceptional sharpness
- Solid build quality
- Bright maximum aperture
- High level of resolution
- Bright maximum aperture
- Good sharpness
- Well corrected
Cons
- On the heavy side
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- Lacks weather sealing
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