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  • Sigma 10-20mm f4-5.6 EX DC Lens For Pentax Digital SLR Cameras
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Sigma 10-20mm f4-5.6 EX DC Lens For Pentax Digital SLR Cameras

by Sigma

RRP: £549.99
Price: £340.74
You Save: £209.25 (38%)
Only 1 left in stock.
Dispatched from and sold by PHOTO UNIVERS.
6 new from £340.74 1 used from £309.15
  • A super wide-angle zoom lens designed for digital cameras with an APS-C size sensor
  • 3 special low dispersion glass elements and 3 aspherical elements for optimum quality
  • Super multi-layer lens coating to reduce flare and ghosting
  • Full time manual focusing
  • Internal focusing
  • Non rotating front element
  • Compact and lightweight
  • Extended 2 year UK warranty

Frequently Bought Together

Sigma 10-20mm f4-5.6 EX DC Lens For Pentax Digital SLR Cameras + Hoya 77mm Pro-1 Digital UV Screw in Filter + Hoya 77mm Pro-1 Digital Circular Polarizing Filter
Price For All Three: £419.70

These items are dispatched from and sold by different sellers.

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Product details

  • Product Dimensions: 8.1 x 8.4 x 8.4 cm ; 472 g
  • Boxed-product Weight: 762 g
  • Item model number: B000ELC666
  • ASIN: B000ELC666
  • Date first available at Amazon.co.uk: 8 Jun. 2007
  • Average Customer Review: 4.9 out of 5 stars  See all reviews (7 customer reviews)

Product Description

Product Description

Sigma 10-20mm f/4-5.6 EX DC Lens

Produced in the legendary Aizu facility in Japan, Sigma presents their Sigma 10-20mm f/4-5.6 EX DC Lens. Building on 50 years of innovation in precision optics design and craftsmanship, the 10-20mm is an ultra wide angle zoom lens which encompasses several advance features designed to counter commonly found optical aberrations. Deep and ultra sharp images are produced as a result, making it a great value all round offering to any budding photographer.

Near-Far effect helps to push and pull subjects to give a longer field of view

Near-Far effect helps to push and pull subjects to give a longer field of view

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The Lens Design

Design features make up the foundation of the Sigma 10-20mm lens. Measuring just 8.1cm x 8.4cm and weighing an acceptable 470g, it is both lightweight and compact for its focal class, making it easy to handle but at the same time feel balanced when mounted on a DSLR. The lens features Sigma’s in-house developed inner focus system, which both eliminates the need to extend the barrel, reducing light loss, and the need to rotate the front lens. In staying fixed, the front lens can accommodate a petal design hood (included) that helps to counter light related issues such as glare. The inner focussing system also allows for the use of Circular Polarising filters. The lens is manufactured to Sigma’s high standards with the body constructed from strong but lightweight polycarbonate, layered in a hard-wear paint finish.

3 SLD and 3 Aspherical lens elements help to counter various colour and optical aberrations

3 SLD and 3 Aspherical lens elements help to counter various colour and optical aberrations

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The Ultra Wide Angle Effect

With a small variable focal length from 10 to 20mm, this rectilinear lens is capable of capturing ultra wide angle images (102.4° to 63.8°) which become “exaggerated” in perspective. Thanks to higher aperture settings (f4-5.6), the depth of field appears greatly increased giving the added benefit of keeping all subjects in focus despite their varying distances. This effect also creates a near-far relationship where backgrounds seem to be pushed further away to make them appear smaller and closer subjects pulled nearer to make them appear bigger, creating a unique “stretched” effect. With a close focus distance of just 24cm, which stays consistent through all the focal lengths, you can capture subjects in their entirety whether standing close up or composing the image from a tight space. In anticipation of the regular inclusion of bright light sources (e.g. the sun), Sigma have also designed the lens to better cope with the undesirable effects of flare and glare.

The Optical Composition

In all forms of lens construction, Sigma puts the highest emphasis on the quality and craftsmanship of the internal optics. As a result, the 10-20mm incorporates a set of cutting edge and unique optical features which work to create bright and sharp images. Three out of fourteen lens elements are manufactured from Special Low Dispersion (SLD) glass, renowned for its high resolution and light transmission properties. They work in conjunction with one glass mould and two hybrid aspherical lens elements to counter various colour and optical aberrations which are commonly found in ultra wide angle lenses, such as chromatic aberration. Furthermore, the configuration also ensures that all levels of distortion are corrected. The resulting images speak for themselves in terms of sharpness and resolution.

Super Multi Layer coatings work to eliminate flare and ghost irregularities

Super Multi Layer coatings work to eliminate flare and ghost irregularities

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Finally, Sigma applies Super Multi Layer coatings to all lens elements, which work to create an optimum colour balance by reducing the damaging effects of ghost and flare. They also help to maximise light transmission to the DSLR’s sensor.

The lens features make it ideally suited to multiple uses including architectural photography

The lens features make it ideally suited to multiple uses including architectural photography

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A Lens Most Applicable For......

With an achievable focal length between 10-20mm and multiple specialist optical features, this Sigma lens is a perfect match for any photographer who would like to compose images with an ultra wide angle perspective*. Accurately, quickly and consistently these wide angle images can be produced both indoors and out, all with the same stunning results. Landscape and architectural photography are therefore perfectly suited to this type of lens. Furthermore, thanks to a permanent close focus distance and a high speed auto focus system, the lens would perform well in various forms of close-up photography. Finally, the compact and lightweight (for its class) design combined with the silent focus function, make the lens both portable and stealthy meaning it would work well when used out in the field accommodating wildlife photography as well as other specialist outdoor pursuits.

* only suitable for cameras with an APS-C size sensor

Box Contains

  • Lens Hood
  • Fitted Padded Case
  • Front and Rear Caps
  • Instruction Manual
  • 1 Year Warranty Card

  • Customer Questions & Answers

    Customer Reviews

    4.9 out of 5 stars
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    Most Helpful Customer Reviews

    18 of 18 people found the following review helpful By John Williams TOP 1000 REVIEWERVINE VOICE on 30 Sept. 2010
    I bought this lens for my Pentax Kx. First used it on a holiday in Yellowstone Park. It was on the camera most of the time; my other two lenses didn't get much use. I was stunned with the results - sharp, bright and with less distortion than I had expected. I think this lens will give me a lot of pleasure for years to come. The lens is quite squat and chunky, and has a solid feel. With such a wide lens there will always be a risk of flare; this will be reduced by using the lens hood supplied. The zoom ring doesn't travel far from its minimum to maximum length, and neither does the focusing ring. Both rings turn smoothly, with the zoom ring (the one nearer the rear of the lens) having rather more resistance than the focusing ring. Autofocus works fine, but I find that I use manual focus more. With filter and both lens caps in place the Sigma weighs in at 437g according to my kitchen scales. This is almost twice the weight of the Pentax 18-55 mm kit lens, heavy enough to make the combination feel nice and solid, but not so heavy as to make it unwieldy or to deter me from taking it on my travels or long walks, or from using it on a tripod. One little gripe; I found the rear lens cap very fiddly to fit, and prefer to use the Pentax rear cap when the lens is not in use. Why this should be is a mystery to me.

    One other thing. This has been described as a budget lens, but it isn't cheap by my standards. You will want to protect the front element, but 77 mm filters don't come cheap either. I am very happy that when I bought the lens I also splashed out on the Tiffen 77 mm Photo Essentials kit, which I have also reviewed on this site. I find that the polarising filter stays on the lens most of the time, and there are no problems with vignetting, even with the lens at its widest (10mm) focal length.
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    10 of 10 people found the following review helpful By Yellowbear on 31 July 2011
    Verified Purchase
    I have long wanted a really wide angle zoom lens but the price has always been prohibitive. This lens isn't cheap but compared with the alternatives it is a lot less expensive. Apart from the furry finish it looks well made and I have now used it for about 12 months and find it hard to fault. Very little distortion but if you put a polariser over the skylight filter that I keep on it all the time to protect it then the vignetting is noticeable. So take the skylight off first! To pay more than this you would have to be buying a very high quality lens and unless you are a pro I don't see the point.
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    2 of 2 people found the following review helpful By GCW on 22 Sept. 2013
    Verified Purchase
    Loved using this on a recent visit to Yellowstone. There is some distortion but easily corrected in Lightroom using a profile. For landscapes it is great but it is also useful for interior shoots too where you need to go wide to get the whole room in.
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    2 of 2 people found the following review helpful By Jasper on 12 April 2013
    This is a brilliant lens. I bought it to use on my K-X and it works wonders. All photos in this set were taken with the KX and this lens [...]. If you're thinking about buying this lens I would really recommend that you consider buying a filter aswell as the front element is very large and could be scratched easily. I just use a slim Hoya UV filter that does the job fine.
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