Compare Sigma 17-70mm F2.8-4 DC Macro vs Pentax DA 16-85mm F3.5-5.6
Construction
Aperture Blades
7 blades, rounded
7 blades, Rounded aperture
Colors
Black
Form Factor
Standard Zoom Lens
Standard Zoom Lens
Image Size
APS-C
APS-C
Lens Barrel
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Material
Plastic barrel, metal mount
Motor
Micro-type ultrasonic
Optical Formula | Elements
16 elements
16 elements
Optical Formula | Groups
14 groups
12 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
HD, Super Protect coatings groups
Dimensions
Filter Diameter
72 mm / 2.83 in
72 mm / 2.83 in
Size | Diameter
79 mm / 3.11 in
78 mm / 3.07 in
Size | Length
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
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/2.8–4 ~ f/22
f/3.5–5.6 ~ f/22–38
Autofocus
Yes
Yes
Crop Factor
1.5
1.5
Focal Length
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
Extending front
Image Stabilization
Yes
No
Weather Resistance
Yes
Zoom Type
External zoom
External zoom
Performance
Max Magnification
0.36x
0.26x
Min Focus Distance
220 mm / 8.66 in
350 mm / 13.78 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens Hood: PR-RBA72 (supplied)
Debut
2012-09-17
2014-10-29
Made In
Japan
Reviews
Neofiliac score
65%
50%
Pros
- Optically stabilized
- Rather good resolution
- Weather-sealed
Cons
- 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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