Compare Sigma 17-70mm F2.8-4 DC Macro vs Pentax-DA 11-18mm F2.8

7 blades, rounded

Standard Zoom Lens

Ultra Wide-Angle Zoom Lens

APS-C

APS-C

Distance scale

Distance scale

Canon EF-mount, Nikon F-mount, Pentax K-mount, Sigma SA-mount, Sony A-mount

Pentax K-mount

Plastic barrel, metal mount

Micro-type ultrasonic

16 elements

14 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

72 mm / 2.83 in

79 mm / 3.11 in

82 mm / 3.23 in

465 g / 16.43 oz

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)

f/2.8–4 ~ f/22

f/2.8

Yes

Yes

1.5

1.5

17 mm ~ 70 mm

11 mm ~ 18 mm

25.5 mm ~ 105.0 mm

16.5 mm ~ 27.0 mm

Internal

Yes

No

External zoom

External zoom

0.36x

220 mm / 8.66 in

Lens Hood: LH780-03 (supplied)

Lens hood included

2012-09-17

2017-10-26

Japan