Compare Sigma 20mm F1.4 DG HSM vs Sigma 12-24mm F4 DG HSM vs Canon RF 15-35mm F2.8
Construction
Aperture Blades
9 blades, Rounded blades
9 blades
9 blades
Colors
Black
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Wide-Angle Zoom Lens
Image Size
Full-Frame
Full-Frame
Full-Frame
Lens Barrel
Distance scale
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, Sigma SA-mount
Canon RF-mount
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Ring-type ultrasonic
Nano ultrasonic
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
FLD + aspheric elements, Super Multi-Layer coating groups
3 aspherical + 2 UD elements groups
Dimensions
Filter Diameter
82 mm / 3.23 in
Size | Diameter
91 mm / 3.58 in
101 mm / 3.98 in
89 mm / 3.50 in
Size | Length
130 mm / 5.12 in
132 mm / 5.20 in
127 mm / 5.00 in
Weight
950 g / 33.57 oz
1150 g / 40.64 oz
840 g / 29.68 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
122.0° Diagonal | 112.6° Horizontal | 90.0° Vertical (wide) ~ 84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (tele)
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 63.5° Diagonal | 54.4° Horizontal | 37.8° Vertical (tele)
Aperture
f/1.4 ~ f/16
f/4 ~ f/22
f/2.8
Autofocus
Yes
Yes
Yes
Focal Length
20 mm
12 mm ~ 24 mm
15 mm ~ 35 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
No
Yes (5 stops)
Weather Resistance
No
Yes
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.14x
0.2x
0.21x
Min Focus Distance
300 mm / 11.81 in
240 mm / 9.45 in
280 mm / 11.02 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2015-10-16
2016-09-19
2019-02-14
Made In
Japan
Japan
Reviews
Neofiliac score
55%
38%
71%
Pros
- High level of resolution
- Bright maximum aperture
- Weather-sealed
- Quite good level of resolution
- 1mm wider than the EF-mount version
- Low distortion
- Unique image stabilization
- Weather-sealed
- Good sharpness
Cons
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- Dark maximum aperture
- Very large and heavy
- Lacks front filter thread
- On the heavy side
- External zoom without zoom lock
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