Compare Sigma 20mm F1.4 DG HSM vs Tamron 10-24mm F/3.5-4.5 Di II VC vs Tamron 17-70mm F/2.8
Construction
Aperture Blades
9 blades, Rounded blades
7 blades
9 blades
Colors
Black
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Zoom Lens
Standard Zoom Lens
Image Size
Full-Frame
APS-C
APS-C
Lens Barrel
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount, Sony E-mount, Leica L-mount
Canon EF-mount, Nikon F-mount
Sony E-mount
Motor
Ring-type ultrasonic
Stepper motor
Optical Formula | Elements
15 elements
16 elements
16 elements
Optical Formula | Groups
11 groups
11 groups
12 groups
Optical Formula | Special Glass
Two FLD, five SLD elements + Super Multi-Layer coating groups
Broad-band Anti-reflection & fluorine coatingsLD, XLD, aspherical, and hybrid aspherical elements. groups
1 aspherical + 2 glass-molded aspherical elements groups
Dimensions
Filter Diameter
77 mm / 3.03 in
67 mm / 2.64 in
Size | Diameter
91 mm / 3.58 in
84 mm / 3.31 in
75 mm / 2.95 in
Size | Length
130 mm / 5.12 in
85 mm / 3.35 in
119 mm / 4.69 in
Weight
950 g / 33.57 oz
440 g / 15.55 oz
525 g / 18.55 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 62.0° Diagonal | 53.1° Horizontal | 36.9° Vertical (tele)
80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
Aperture
f/1.4 ~ f/16
f/3.5–22 ~ f/4.5–29
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
20 mm
10 mm ~ 24 mm
17 mm ~ 70 mm
Focal Length (35mm Equivalent)
15.0 mm ~ 36.0 mm
25.5 mm ~ 105.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
Yes
Yes
Weather Resistance
No
Yes
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.14x
0.19x
0.21x
Min Focus Distance
300 mm / 11.81 in
240 mm / 9.45 in
190 mm / 7.48 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2015-10-16
2017-02-06
2020-12-03
Made In
Japan
Model Name
B023
B070
Reviews
Neofiliac score
55%
69%
69%
Pros
- High level of resolution
- Bright maximum aperture
- Optically stabilized
- Weather-sealed
- Good autofocus
- Optically stabilized
- Weather-sealed
- Fast AF
- Good image quality
Cons
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- External zoom without zoom lock
- Not the highest build quality
- External zoom without zoom lock
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