Compare Sigma 17-70mm F2.8-4 DC Macro vs Pentax-DA 11-18mm F2.8 vs PENTAX-D FA 15-30mm F2.8
Construction
Aperture Blades
7 blades, rounded
9 blades
Colors
Black
Form Factor
Standard Zoom Lens
Ultra Wide-Angle Zoom Lens
Ultra Wide-Angle Zoom Lens
Image Size
APS-C
APS-C
Full-Frame
Lens Barrel
Distance scale
Distance scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Pentax K-mount
Material
Plastic barrel, metal mount
Motor
Micro-type ultrasonic
Ultrasonic
Optical Formula | Elements
16 elements
18 elements
Optical Formula | Groups
14 groups
13 groups
Optical Formula | Special Glass
2 FLD ("F" Low Dispersion) glass elements, 1 SLD (Special Low Dispersion) glass element, 3 aspherical glass lenses including double sided aspherical lens groups
Three ED and aspherical elements + HD and SP coatings groups
Dimensions
Filter Diameter
72 mm / 2.83 in
Size | Diameter
79 mm / 3.11 in
99 mm / 3.90 in
Size | Length
82 mm / 3.23 in
144 mm / 5.67 in
Weight
465 g / 16.43 oz
1040 g / 36.75 oz
Function
Angle Of View
80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
105.4° Diagonal | 95.0° Horizontal | 72.1° Vertical (wide) ~ 77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (tele)
110.6° Diagonal | 100.4° Horizontal | 77.3° Vertical (wide) ~ 71.6° Diagonal | 61.9° Horizontal | 43.6° Vertical (tele)
Aperture
f/2.8–4 ~ f/22
f/2.8
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
17 mm ~ 70 mm
11 mm ~ 18 mm
15 mm ~ 30 mm
Focal Length (35mm Equivalent)
25.5 mm ~ 105.0 mm
16.5 mm ~ 27.0 mm
Focus Type
Internal
Internal
Image Stabilization
Yes
No
No
Weather Resistance
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.36x
0.2x
Min Focus Distance
220 mm / 8.66 in
280 mm / 11.02 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens hood included
Lens hood included
Debut
2012-09-17
2017-10-26
2016-02-17
Made In
Japan
Reviews
Neofiliac score
65%
40%
31%
Pros
- Optically stabilized
- Rather good resolution
- Good build quality
- Good center resolution
- Constant f/2.8 aperture
- Great optical performance
- Weather-sealed
- Beautifully constructed
Cons
- External zoom without zoom lock
- Merely 0.36x maximum magnification despite named "Macro"
- Lacks front filter thread
- Expensive for an APS-C wide-angle zoom
- Rather long
- On the heavy side
- Lacks front filter thread
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