History

    Ultra wide-angle zoom lens
    with a large, constant aperture of F3.5, designed specifically
    for digital SLR cameras

    This Ultra wide-angle zoom lens has a maximum aperture of F3.5 throughout the entire zoom range, making it suitable for low-light and indoor photography. It’s wide-angle of view from 102.4*degrees produces striking images with exaggerated perspective, enabling photographers to emphasize the subject. ELD (Extraordinary Low Dispersion) glass, SLD (Special Low Dispersion) glass and aspherical lenses provide excellent correction of all types of aberrations. The super multi-layer lens coating reduces flare and ghosting and creates high image quality throughout the entire zoom range. The HSM (Hyper Sonic Motor) ensures fast and quiet autofocus, while allowing full-time manual focus override.

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

    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.

    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 if the Pentax camera bodies do not support HSM.

    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.

    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.

    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.

    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.

    Specifications

    10-20mm F3.5 EX DC HSM

    Lens Construction

    • ELD glass
    • SLD glass
    • ASPHERICAL LENS

    Lens Construction

    13 elements in 10 groups

    Angle of View

    • 109.7 - 70.7°

    Number of Diaphragm Blades

    7 Blades

    Minimum Aperture

    F22

    Minimum Focusing Distance

    24cm / 9.4in.

    Maximum Magnification Ratio

    1:6.6

    Filter size

    φ82mm

    Dimensions (Diameter × Length)

    • ⌀87.3mm × 88.2mm / ⌀3.4in. × 3.5in.
    • *The length of a lens is measured from the filter surface to its mount.

    Weight

    • 520g / 18.3oz.

    Supplied Accessories

    CASE and PENTAL TYPE LENS HOOD (LH873-01) included.

    Corresponding AF Mounts / Barcode No.

    • SIGMA SA-Mount
      00-85126-20256-9
    • Nikon F Mount
      00-85126-20255-2

    Performance / Data

    MTF Chart

    The MTF chart gives the result at the wide-open aperture
    Spatial frequency S:Sagittal Line M:Meridional Line
    10lp/mm
    30lp/mm

    MTF chart guide

    Distortion

    Vignetting

    F3.5
    F8
    F16
    F3.5
    F8
    F16

    Vignetting guide

    Product Lineup

    10-20mm F3.5 EX DC HSM

    • SIGMA SA-mount

      Supplied Accessories

      CASE and PENTAL TYPE LENS HOOD (LH873-01) included.

      Barcode No.
      00-85126-20256-9
    • Nikon F mount

      Supplied Accessories

      CASE and PENTAL TYPE LENS HOOD (LH873-01) included.

      Barcode No.
      00-85126-20255-2

    Support

    10-20mm F3.5 EX DC HSM

    Accessories

    Supplied Accessories

    LENS HOOD LH873-01

    Barcode No.
    00-85126-92693-9

    FRONT CAP LCF-82mm Ⅲ

    Barcode No.
    00-85126-93002-8

    REAR CAP LCR Ⅱ

    * The image is for SIGMA.

    • SIGMA SA-mount

      Barcode No.
      00-85126-92949-7
    • Nikon F mount

      Barcode No.
      00-85126-92950-3
    • Canon EF mount

      Barcode No.
      00-85126-92951-0

    Separately Sold Accessories

    WR CERAMIC PROTECTOR 82mm

    With many applications in aerospace and other industries, glass ceramic is an extremely tough type of crystallized glass that serves as the foundation for Clear Glass Ceramic. While featuring the high transmittance required of optical devices, this advanced new material combines greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass. These qualities make Clear Glass Ceramic the ideal material for protective lens filters.

    * Thinner frame wide type.

    Barcode No.
    00-85126-93183-4

    WR PROTECTOR 82mm

    Water-repellent, Antistatic type. Protector is developed to protect the lens surface from dirt and dust as well as scratches. It is an ideal filter for regular use as it is completely colorless so does not affect color reproduction.

    * Thinner frame wide type.

    Barcode No.
    00-85126-93097-4

    PROTECTOR 82mm

    Normal type. Protector is developed to protect the lens surface from dirt and dust as well as scratches. It is an ideal filter for regular use as it is completely colorless so does not affect color reproduction.

    * Thinner frame wide type.

    Barcode No.
    00-85126-93110-0

    WR UV FILTER 82mm

    UV Water-repellent, Antistatic type. UV filter prevents the bluish tone that generates when the weather is fine, by absorbing ultraviolet rays. It is effective in most situations, such as landscape, portrait and general photography on a sunny day. It is also an ideal filter for regular use as it is completely colorless so does not affect color reproduction.

    * Thinner frame wide type.

    Barcode No.
    00-85126-93071-4

    WR CIRCULAR PL FILTER 82mm

    PL Water-repellent, Antistatic type. Circular PL filter removes the reflection of water surface and glass windows, and increases the contrast in landscape photography.

    * Thinner frame wide type.

    Barcode No.
    00-85126-93084-4