Compare Sigma 20mm F1.4 DG HSM vs Sigma 18-200mm F3.5-6.3 DC Macro OS HSM vs Pentax-DA 11-18mm F2.8
Construction
Aperture Blades
9 blades, Rounded blades
7 blades, Rounded diaphragm
Colors
Black
Form Factor
Ultra Wide-Angle Prime Lens
All-in-One Zoom Lens
Ultra Wide-Angle Zoom Lens
Image Size
Full-Frame
APS-C
APS-C
Lens Barrel
Distance scale
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, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Motor
Ring-type ultrasonic
Ultrasonic
Optical Formula | Elements
15 elements
16 elements
Optical Formula | Groups
11 groups
13 groups
Optical Formula | Special Glass
Two FLD, five SLD elements + Super Multi-Layer coating groups
SLD glass elements, Double-sided aspheric lenses groups
Dimensions
Filter Diameter
62 mm / 2.44 in
Size | Diameter
91 mm / 3.58 in
71 mm / 2.80 in
Size | Length
130 mm / 5.12 in
86 mm / 3.39 in
Weight
950 g / 33.57 oz
430 g / 15.19 oz
Function
Angle Of View
94.5° Diagonal | 84.0° Horizontal | 61.9° Vertical
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 8.3° Diagonal | 6.9° Horizontal | 4.6° Vertical (tele)
105.4° Diagonal | 95.0° Horizontal | 72.1° Vertical (wide) ~ 77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (tele)
Aperture
f/1.4 ~ f/16
f/3.5–6.3 ~ f/22
f/2.8
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
20 mm
18 mm ~ 200 mm
11 mm ~ 18 mm
Focal Length (35mm Equivalent)
27.0 mm ~ 300.0 mm
16.5 mm ~ 27.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
Yes
No
Weather Resistance
No
Zoom Type
External zoom (zoom lock available)
External zoom
Performance
Max Magnification
0.14x
0.33x
Min Focus Distance
300 mm / 11.81 in
390 mm / 15.35 in
Production
Accessory
Lens hood included
Lens hood included
Debut
2015-10-16
2014-01-06
2017-10-26
Made In
Japan
Japan
Reviews
Neofiliac score
55%
55%
40%
Pros
- High level of resolution
- Bright maximum aperture
- Optically stabilized
- Zoom lock prevents zoom creep
- Superb build quality
- Very useful focal range
- Good build quality
- Good center resolution
Cons
- Large and heavy
- Lacks front filter thread
- Lacks weather sealing
- All-in-one lenses tend to offer lower IQ
- Lacks front filter thread
- Expensive for an APS-C wide-angle zoom
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