Compare Sigma 20mm F1.4 DG HSM vs Canon RF 15-30mm F4.5-6.3 vs Canon RF 24-70mm F2.8
Construction
Aperture Blades
9 blades, Rounded blades
7 blades
9 blades
Colors
Black
Black
Black
Form Factor
Ultra Wide-Angle Prime Lens
Ultra Wide-Angle Zoom Lens
Standard 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 RF-mount
Canon RF-mount
Material
Magnesium alloy
Motor
Ring-type ultrasonic
Stepper motor
Nano ultrasonic
Optical Formula | Elements
15 elements
13 elements
21 elements
Optical Formula | Groups
11 groups
11 groups
15 groups
Optical Formula | Special Glass
Two FLD, five SLD elements + Super Multi-Layer coating groups
Two ultra-low dispersion elements and one aspherical element. Uses Canon’s Super Spectra Coating (SSC). groups
3 aspherical + 3 UD elements groups
Dimensions
Filter Diameter
67 mm / 2.64 in
82 mm / 3.23 in
Size | Diameter
91 mm / 3.58 in
77 mm / 3.03 in
89 mm / 3.50 in
Size | Length
130 mm / 5.12 in
88 mm / 3.46 in
126 mm / 4.96 in
Weight
950 g / 33.57 oz
390 g / 13.78 oz
900 g / 31.80 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 34.4° Diagonal | 28.8° Horizontal | 19.5° Vertical (tele)
Aperture
f/1.4 ~ f/16
f/4.5–6.3 ~ f/22–32
f/2.8
Autofocus
Yes
Yes
Yes
Focal Length
20 mm
15 mm ~ 30 mm
24 mm ~ 70 mm
Focus Type
Internal
Internal
Image Stabilization
No
Yes
Yes (5 stops)
Weather Resistance
No
No
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.14x
0.3x
Min Focus Distance
300 mm / 11.81 in
130 mm / 5.12 in
210 mm / 8.27 in
Production
Accessory
Lens hood included
Lens hood included
Lens hood included
Debut
2015-10-16
2022-07-12
2019-02-14
Made In
Japan
Reviews
Neofiliac score
55%
37%
71%
Pros
- High level of resolution
- Bright maximum aperture
- Affordable
- Interesting zoom range
- Stabilized
- Useful f/2.8 aperture
- Optically stabilized (as opposed to the competition)
- Weather-sealed
Cons
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- Dark maximum aperture
- External zoom without zoom lock
- Lacks weather sealing
- Low build quality
- On the heavy side
- External zoom without zoom lock
- Not as solid as older Canon L lenses
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