Compare Sigma 18-35mm F1.8 DC HSM vs Sigma 17-70mm F2.8-4 DC Macro vs Pentax-DA* 16-50mm F2.8
Construction
Aperture Blades
9 blades, Rounded diaphragm
7 blades, rounded
9 blades
Colors
Black
Form Factor
Zoom Lens
Standard Zoom Lens
Standard Zoom Lens
Image Size
APS-C
APS-C
APS-C
Lens Barrel
Distance scale
Distance scale
Lens Mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount
Pentax K-mount
Material
Plastic barrel, metal mount
Magnesium alloy
Motor
Ring-type ultrasonic
Micro-type ultrasonic
Stepper motor
Optical Formula | Elements
17 elements
16 elements
16 elements
Optical Formula | Groups
12 groups
14 groups
10 groups
Optical Formula | Special Glass
5 SLD glass elements, 4 glassmold 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
ED + anomalous glass + aspherical elements, HD coating groups
Dimensions
Filter Diameter
72 mm / 2.83 in
72 mm / 2.83 in
77 mm / 3.03 in
Size | Diameter
78 mm / 3.07 in
79 mm / 3.11 in
84 mm / 3.31 in
Size | Length
121 mm / 4.76 in
82 mm / 3.23 in
117 mm / 4.61 in
Weight
810 g / 28.62 oz
465 g / 16.43 oz
712 g / 25.16 oz
Function
Angle Of View
77.4° Diagonal | 67.4° Horizontal | 47.9° Vertical (wide) ~ 44.8° Diagonal | 37.8° Horizontal | 25.8° 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) ~ 32.2° Diagonal | 27.0° Horizontal | 18.2° Vertical (tele)
Aperture
f/1.8 ~ f/16
f/2.8–4 ~ f/22
f/2.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
1.5
1.5
Focal Length
18 mm ~ 35 mm
17 mm ~ 70 mm
16 mm ~ 50 mm
Focal Length (35mm Equivalent)
27.0 mm ~ 52.5 mm
25.5 mm ~ 105.0 mm
24.0 mm ~ 75.0 mm
Focus Type
Internal
Internal
Internal
Image Stabilization
No
Yes
No
Weather Resistance
Yes
Zoom Type
Internal zoom
External zoom
External zoom
Performance
Max Magnification
0.23x
0.36x
0.24x
Min Focus Distance
280 mm / 11.02 in
220 mm / 8.66 in
300 mm / 11.81 in
Production
Accessory
Lens Hood: LH780-03 (supplied)
Lens Hood: LH780-03 (supplied)
Lens Hood: PH-RBN77 (sold separately)
Debut
2013-04-18
2012-09-17
2021-07-14
Made In
Japan
Japan
Reviews
Neofiliac score
65%
65%
40%
Pros
- Internal zoom
- High levels of resolution
- Optically stabilized
- Rather good resolution
- Weather-sealed
- Solid build quality
Cons
- Rather large and heavy for an APS-C lens
- External zoom without zoom lock
- Merely 0.36x maximum magnification despite named "Macro"
- Exterior designed like a 1990's lens
- External zoom without zoom lock
- Lens hood not included
- Expensive for APS-C
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