Sigma AF 10-20mm f/3.5 EX DC HSM - Pentax

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Product Overview

  • K-Mount Lens/APS-C Format
  • 15-30mm (35mm Equivalent)
  • Aperture Range: f/3.5 to f/22
  • Two ELD Elements, One SLD Element
  • Four Aspherical Elements
  • Super Multi-Layer Coating
  • Hyper Sonic Motor AF System
  • 7-Blade Diaphragm
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Covering a flexible ultra-wide range, the Pentax K-mount 10-20mm f/3.5 EX DC HSM from Sigma is a versatile zoom well-suited for landscape, architectural, and interior photography. The lens's optical design incorporates a series of low dispersion and aspherical elements, which help to reduce chromatic and spherical aberrations throughout the zoom range, as well as contribute to improved sharpness and clarity. A Super Multi-Layer Coating is also used to suppress flare and ghosting for improved contrast and color accuracy. Benefitting the imaging attributes, a Hyper Sonic Motor also affords quick and quiet autofocus performance as well as full-time manual focus override.

Wide-angle zoom is designed for APS-C-format Pentax K-mount cameras and provides a 15-30mm equivalent focal length range.
Constant f/3.5 maximum aperture is suitable for working in available light conditions.
Two Extra-Low Dispersion (ELD) elements and one Special Low Dispersion (SLD) element are featured in the optical design, and help to reduce color fringing and chromatic aberrations for improved clarity and color accuracy.
Four aspherical elements are used to help limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering.
Super Multi-Layer Coating has been applied to individual elements to minimize flare and ghosting for improved contrast and color accuracy when working in strong lighting conditions.
Hyper Sonic Motor (HSM), along with an internal focusing design, realizes quick and quiet autofocus performance as well as full-time manual focus override.
Minimum focusing distance of 9.4" is available throughout the zoom range.
Seven-blade diaphragm contributes to a pleasing bokeh quality.
  • MPN - 4202961
  • GTIN - 0085126202613
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Brand Sigma
Focal Length 10 - 20mm
Lens type Zoom lens
Aperture Range Maximum: f/3.5
Minimum: f/22
Max Format size APS-C/DX
Camera Mount Pentax K
Lens Format Pentax Digital (APS-C)
Lens mount Canon EF, Nikon F (DX), Pentax KAF, Sony Alpha, Sigma SA
Minimum Focusing Distance 9.4“ (23.88 cm)
Focus Type Autofocus
Minimum aperture f/22.0
Image Stabilizer No
Diaphragm Blades 7
Angle Of View 102.4 - 63.8
Elements 13
Groups 10
Groups 10
Diaphragm Blades 7
Filter Size 82 mm
Tripod Collar No
Autofocus Yes
Elements 13
Motor Type Ring-type Ultrasonic
Weight 520
Dimensions (DxL) Approx. 3.4 x 3.5“ (8.64 x 8.89 cm)
Diameter 87 mm
Weight 520
Length 88 mm
Sealing No
Filter Thread 82 mm
Focal Length 10 - 20mm
Filter Thread Size 82 mm
Dimensions(DxL) 8.64 x 8.89 cm
Weight 520 g
Tripod Collar No
Autofocus Yes
Image Stabilization No
Aperture Maximum: f/3.5
Minimum: f/22
Camera Mount Type Pentax K
Format Compatibility Pentax Digital (APS-C)
Angle of View 102.4 - 63.8
Minimum Focus Distance 23.88 cm
Magnification 0.15x
Maximum Reproduction Ratio 1:7
Optical Design 13 Elements in 10 Groups
Diaphragm Blades 7
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What’s In The Box
  • Sigma 10-20mm f/3.5 EX DC HSM Lens for Pentax
  • Sigma 10-20mm f/3.5 EX DC HSM Lens for Pentax 
  • LCF-82 III 82mm Lens Cap x 1
  • Rear Cap LCR II for Pentax K Mount Lenses x 1
  • Lens Hood for 10-20mm f/3.5 EX DC HSM Lens x 1
  • Lens Case x 1
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