Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Pentax

Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Pentax

Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Pentax

B&H # EMBLEN12209
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Product Highlights

  • Zoom Super Wide Angle
  • Two ELD Glass Elements
  • Fast and Silent HSM AF
  • Robust Construction
  • Made in Japan
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Price: $649.00

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  • 1Description

The Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom is a super-wide angle lens with a relatively bright f/3.5 maximum aperture throughout its zoom range, helping to ensure high image quality. The lens gathers enough light to make it a great choice for indoor shooting as well as landscapes and creative portraiture. This version of the lens is exclusively made to fit the Pentax lens mount. It is not intended for use in "full frame" digital SLR cameras, or for any film-based cameras.

With a wide angle viewing range of 102.4-63.8°, this lens can empower a photographer to produce creative images with exaggerated perspective. Its Super Multi-Layer coating reduces flare and ghosting. The HSM autofocus motor provides quiet, high speed operation. You can also shoot with manual focus.

The 10-20 f/3.5 EX DC HSM incorporates an inner focusing system to eliminate front lens rotation, which enables the lens to use the included petal-type bayonet hood to eliminate extraneous light from striking the front of the optic. Two ELD (Extraordinary Low Dispersion) glass elements and a SLD (Special Low Dispersion) glass element provide excellent color fidelity, and 4 aspherical lens elements provide correction for common distortions.

This lens has a minimum focusing distance of 9.4" (24cm) throughout the entire zoom range, and a maximum magnification ratio of 1:6.6.

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

Broad 10-20mm zoom range is ideally suited to tight interiors or expansive landscapes with "APS-C" type digital SLRs
High Image Quality
Two ELD (Extraordinary Low Dispersion) glass elements, one SLD (Special Low Dispersion) glass element, and 4 aspherical lens elements help render undistorted scenes with true color
Fast and Silent AF
Sigma's best HSM autofocus allows for quick operation that's barely audible, along with fulltime manual override
EX Build Quality
Sigma "EX" lenses feature robust construction appropriate for demanding professional use and are backed with a 4-year warranty against manufacturer defects for USA customers
Made in Japan
The 10-20 f/3.5 EX DC HSM is made in Sigma's Japanese factory
In the Box
Sigma 10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Pentax
  • Lens Hood
  • Front & Rear Lens Caps
  • Limited 1-Year North and South America Warranty Against Manufacturing and Workmanship Defects.
  • Limited 3-Year U.S.A. Extended Warranty Extension Against Manufacturing and Workmanship Defects.
  • Table of Contents
    • 1Description
    Focal Length 10 - 20mm
    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 9.4" / 23.88 cm
    Magnification 0.15x
    Maximum Reproduction Ratio 1:7
    Optical Design 13 Elements in 10 Groups
    Diaphragm Blades 7
    Image Stabilization No
    Autofocus Yes
    Tripod Collar No
    Filter Thread 82 mm
    Dimensions (DxL) 3.4 x 3.5" / 8.64 x 8.89 cm
    Weight 1.14 lb / 520 g
    Packaging Info
    Package Weight 1.75 lb
    10-20mm f/3.5 EX DC HSM Autofocus Zoom Lens for Pentax is rated 4.8 out of 5 by 41.
    Rated 4 out of 5 by from Good but not great Hum my copy of this lens does produce softer images relative to my 'plasticky' Pentax DA 50-200, my Fuji X100T, and even my tiny Lumix LX5 with a CCD that's 1/8 the size. The focusing is also a bit slow. However with the Pentax's 12-24 which is made by Tokina and with screw-drive focusing, I'm not sure it's worth paying the extra $$$ as well. Don't get me wrong it still produces spectacular images with no noticeable (to me) vignetting it is a good bang for the buck. I think some of the softness can be corrected digitally using photo editing software. This lens is good enough for me as a hobbyist so I'm keeping it but to be honest I'm slightly disappointed.
    Date published: 2016-04-24
    Rated 5 out of 5 by from A high quality fun lens to use I shoot a lot at our local boat basin/marina and when on the docks shooting is tough because the boats are packed in pretty tightly. Well, this lens really opens things up and makes individual boat portraits not only possible but also exciting-- provides interesting perspective distortion. One has to get used to that and use it as appropriate. It also makes a useful landscape lens when a good foreground can be found. Finally, it really opens up enclosed spaces, i.e. interiors. Curvilinear (barrel) distortionis only slight-moderate. This lens is good sized w/ 82mm filter, and on the heavy side, but balances well on a dslr, and it is well built.
    Date published: 2011-07-12
    Rated 5 out of 5 by from Very good lens for an advanced amateur As a somewhat advanced amateur, I appreciate the added scope in focal length that this wide angle, rectalinear lens lends to my 'kit,' which now include this 10mm-20mm, 17mm-70mm, 50mm-200mm, and 300mm. I use a Pentax SLR and the Sigma lenses make a fine and economical contribution. The constant f/3.5 aperture provides good lower-light (fog for instance) capability with focal flexability for composing a wide landscape scene. I have found the results clear and cridp, with very good contrast that alows flexibility in post processing. All in all, I like this lens a lot and consider it a staple of my personal lens choices. A good value--not the least expensive wide angle, but a fine value for my Pentax given its constant aperture.
    Date published: 2012-03-30
    Rated 5 out of 5 by from Nice alternative to the 10-17 I have used both the Sigma 10-20 and the Pentax 10-17. I loved the 10-17 but decided when I had the funds to rebuy that I wanted to spring for the sigma due to the constant aperature and HSM, both are upgrades from the Pentax. I find the HSM to be slightly slower than the screw drive on the Pentax. Not terrible but noticible. The sigma corrects for distortion, whereas the Pentax does not. This is neither good nor bad, unless you have a preference in this area. I found the Pentax 10-17 to be more of a fun lens where the sigma is practical. For a workhorse, pick the Sigma, it's silent and has the constant 3.5 plus distortion correction. If you want a smaller fun lens go with the Pentax, the fisheye on the short end is lots of fun, but it's slower and noisier.
    Date published: 2012-08-06
    Rated 4 out of 5 by from Great lens The reason I brought this lens is because I need a wide lens for my Pentax K5ii. I shot landscape by this lens and it is great at f8. Talk about the bad side. It is quite heavy, compares to usual Pentax lens. But if you use it with the battery grip? OMG, can't be better. The weight balance just perfect. If you are looking forward to a wide lens foe landscape, I will suggest this one. If you want wider, I will suggest Rokinon 8mm f3.5. Conclude, great lens that you should have.
    Date published: 2014-03-26
    Rated 5 out of 5 by from A good compromise UW zoom range The 1st copy I got had malfunctioning AF, but the 2nd is just fine and AF works well. I will use this lens extensively at our local marina to do boat portraits and wide scenics-- and also for landscapes and interiors. At the marina, the boats are packed in pretty tightly and it takes an ultra-wide to open it up. This lens is sharp, contrasty and the constant f3.5 aperture is useful for night work. The lens is well built, but on the downside, it is sort of big and heavy-- about the size and weight of a good 24-75 f2.8. It take 82mm filters which are spendy.
    Date published: 2011-07-19
    Rated 5 out of 5 by from Great Lens This UWA zoom does exactly what I needed it for. I was looking for an ultrawide with a minimum of distortion and this one is it. There are others in this range, but most provide a fisheye effect, or lean heavily in that direction. I wanted a tack sharp UWA below my 15mm ltd prime primarily for landscape use. Great lens for my purposes. Very pleased. It's heavier than I prefer, but worth it. There just aren't comparable lenses in this range with the IQ this 10-20 has.
    Date published: 2015-10-21
    Rated 4 out of 5 by from I like it! I use it with my Pentax K3 II. It is a tad bit slow on autofocus but nothing that bothers me too much. I'm not doing action shots with it. I'm finding that the focus seems a bit soft on some of the shots but that might have more to do with the photographer than the lens. I've only used it for a couple weeks now but I'm really enjoying it so far. I've been capturing some very interesting fall foliage shots. The super-wide angle makes for very creative and artistic images.
    Date published: 2015-10-22
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