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

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The Pentax fit Sigma 10-20mm F3.5 EX DC HSM Lens is a super wide-angle lens with maximum aperture of F3.5 throughout the entire zoom range. It has two ELD glass elements and one SLD glass element which provide excellent correction of colour aberrations. Four aspherical lenses provide correction for distortion and allow its compact and lightweight construction. It also features a hyper sonic motor which enables quiet and high speed auto focus. The Sigma 10-20mm F3.5 EX DC HSM lens is designed for digital SLR cameras with an APS-C sized sensor and vignetting will occur if used with digital SLR cameras with larger sensors or 35mm film SLR cameras. Auto focus will not be available on Pentax camera bodies that do not support HSM.

The key Features

Ultra wide-angle zoom from 102.4* degrees
The 10-20mm F3.5 EX DC HSM lens offers photographers greater freedom of expression by rotating the zoom ring. It is a very powerful tool for architectural, indoor and landscape photography.

*The angle of view changes depending on which camera model the lens is attached to.

Exaggerated perspective
This ultra wide-angle lens allows photographers to create an exaggerated perspective between the subject and the background to emphasize, for example, expanses of a landscape.

Large F3.5 aperture through the entire zoom range
The large, constant aperture of F3.5 provides a bright image in the viewfinder, which helps photographers easily check focusing and composition.

Superior image quality
Two ELD (Extraordinary Low Dispersion) and one SLD(Special Low Dispersion)glass elements are employed for effective compensation of color aberration. The use of two glass mold and two hybrid aspherical lenses offer excellent correction for distortion and astigmatism and assure superior image quality. The super multi-layer coating reduces flare and ghosting and provides high contrast images throughout the entire zoom range.

Quiet and fast AF
This lens incorporates HSM (Hyper Sonic Motor), which ensures a quiet and high-speed auto focus as well as full-time manual focus override by rotation of the focus ring.*

*AF will not function with Pentax ist* series and K100D DSLR cameras that do not support HSM.

Petal-type Hood
An inner focusing system eliminates front lens rotation, making the lens particularly suitable for using the included petal-type lens hood which blocks out extraneous light.

Minimum focusing distance of 24cm (9.4") at all focal lengths
This lens has a minimum focusing distance of 24cm (9.4 inches) throughout the entire zoom range. This close focusing distance on such a wide-angle lens emphasizes perspective and allows the photographer to capture high quality images, not only of the foreground subject but also the surrounding scenery.

*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

Sigma Lens Abbreviations

EX (EX Lens)
The exterior of this lens is EX-finished to denote the superior build and optical quality, and to enhance its appearance.

DC (DC Lens)
Sigma’s DC lenses are designed for cameras with a cropped sensor. Do not put a Sigma DC lens on a camera with a full-frame sensor, such as the 5D Mark III. These are special lenses designed so that the image circle matches the smaller size of the image sensor of most digital SLR cameras. Their specialised design gives these lenses the ideal properties for digital cameras, the compact and lightweight construction is an added bonus.

HSM (Hyper-Sonic Motor)
This lens uses a motor driven by ultrasonic waves to provide a quiet, high-speed AF.



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Product Specification

Aperture Blades 7
Colour Black
Enlargement Ratio 1:6.6
Filter Thread Size (mm) 82
Focal Length – Tele (mm) 20
Focal Length – Wide (mm) 10
Hood Model LH873-01
Included Accessories Case, Petal-type hood
Lens Mount Pentax K
Lens Type Standard Zoom
Manual Focus Switching Yes
Maximum Aperture – Tele 3.5
Maximum Aperture – Wide 3.5
Minimum Aperture 22
Number of Lens Elements 13
Number of Lens Groups 10
Sensor Format APS-C
Size (mm) 87.3 x 88.2 mm
Weight (g) 465
MF switch Yes
Minimum Focus Distance (m) 0.2
Manufacturer Link Sigma
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Product Code: 1032431-wex Manufacturers Part Number: 202961 Got a question? Get it answered...