Compare Sigma 24-70mm F2.8 DG OS HSM vs Sigma 17-70mm F2.8-4 DC Macro vs Pentax DA 16-85mm F3.5-5.6
Construction
Aperture Blades
9 blades
7 blades, rounded
7 blades, Rounded aperture
Colors
Black
Black
Form Factor
Standard Zoom Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
Full-Frame
APS-C
APS-C
Lens Barrel
Distance scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Sigma SA-mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Material
Metal
Plastic barrel, metal mount
Motor
Ring-type ultrasonic
Micro-type ultrasonic
Optical Formula | Elements
19 elements
16 elements
16 elements
Optical Formula | Groups
14 groups
14 groups
12 groups
Optical Formula | Special Glass
Three HLD and four aspherical elements groups
2 FLD ("F" Low Dispersion) glass elements, 1 SLD (Special Low Dispersion) glass element, 3 aspherical glass lenses including double sided aspherical lens groups
HD, Super Protect coatings groups
Dimensions
Filter Diameter
82 mm / 3.23 in
72 mm / 2.83 in
72 mm / 2.83 in
Size | Diameter
88 mm / 3.46 in
79 mm / 3.11 in
78 mm / 3.07 in
Size | Length
108 mm / 4.25 in
82 mm / 3.23 in
94 mm / 3.70 in
Weight
465 g / 16.43 oz
488 g / 17.24 oz
Function
Angle Of View
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 34.4° Diagonal | 28.8° Horizontal | 19.5° Vertical (tele)
80.7° Diagonal | 70.4° Horizontal | 50.4° Vertical (wide) ~ 23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical (tele)
84.1° Diagonal | 73.7° Horizontal | 53.1° Vertical (wide) ~ 19.3° Diagonal | 16.1° Horizontal | 10.8° Vertical (tele)
Aperture
f/2.8 ~ f/22
f/2.8–4 ~ f/22
f/3.5–5.6 ~ f/22–38
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
24 mm ~ 70 mm
17 mm ~ 70 mm
16 mm ~ 85 mm
Focal Length (35mm Equivalent)
25.5 mm ~ 105.0 mm
24.0 mm ~ 127.5 mm
Focus Type
Internal
Internal
Extending front
Image Stabilization
Yes
Yes
No
Weather Resistance
Yes
Yes
Zoom Type
External zoom
External zoom
External zoom
Performance
Max Magnification
0.21x
0.36x
0.26x
Min Focus Distance
370 mm / 14.57 in
220 mm / 8.66 in
350 mm / 13.78 in
Production
Accessory
Lens Hood: LH876-04 (supplied)
Lens Hood: LH780-03 (supplied)
Lens Hood: PR-RBA72 (supplied)
Debut
2017-02-21
2012-09-17
2014-10-29
Made In
Japan
Japan
Reviews
Neofiliac score
83%
65%
50%
Pros
- Optically stabilized
- Weather-sealed
- Solid build quality
- Optically stabilized
- Rather good resolution
- Weather-sealed
Cons
- External zoom without zoom lock
- Not the best Art lens
- External zoom without zoom lock
- Merely 0.36x maximum magnification despite named "Macro"
- Not the best image quality
- Not the best build from Pentax
- External zoom without zoom lock
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