Sigma 10-20 mm F3.5 EX DC HSM Pentax

A wide, fast and high-quality lens that accentuates perspective perfectly. Due to the aperture of f/3.5, it is also suitable for indoor use and allows photographers to emphasise the subject. The multiple lens coating reduces light reflection. High image quality is ensured throughout the entire zoom range. The lens has excellent optical properties, perfect mechanical processing and high-quality materials.

Two ELD glass lens elements and one SLD provide excellent correction of colour aberration. Four aspherical lenses correct distortion and provide compact and lightweight construction of the lens. The built-in Sonic Motor (HSM) ensures fast and quiet autofocus with manual focus enabled in the AF mode. This lens is equipped with an internal focusing, so the front element does not rotate when focusing.

Key Features

• designed for cameras with the APS-C sensor and smaller
• an extra wide-angle lens ideal for cramped interiors and sprawling landscapes
• Two ELD glass elements, one SLD and 4 aspherical lenses for distortion-free images
• high-end ultrasonic focus system (HSM) for fast and accurate AF
• comfortable operation and durable materials 

Additional information:
Construction: 13 lenses in 10 groups
Angle of View: 102.4° - 63.8°
Max. magnification: 1:6.6
Number of blades: 7
Dimensions: 87.3 x 88.2mm (diameter x length)
Weight: 520g
Hood: LH873-01

Note:
1) when using sensors larger than the APS-C, there appears vignetting (35mm SLR etc...)
2) if the Pentax camera does not support HSM, auto focus will not be available