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Sigma 18-50mm f2.8-4.5 DC OS HSM Lens for Sigma Digital SLR Cameras with APS C Sensors

by Sigma


Available from these sellers.


  • Large maximum aperture of F2.8 at 18mm
  • Incorporates Sigma’s original Optical Stabilisation function
  • Two SLD glass elements and three aspherical lenses
  • Hyper Sonic Motor (HSM) ensuring silent, high-speed AF
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Product Description

Product Description

The Sigma 18-50mm f/2.8-4.5 DC OS HSM benefits from Two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction for all type of aberrations. High image quality is assured throughout the entire zoon range. This lens offers a large aperture of F2.8 at the 18mm focal length. This large aperture provides a bright image through the viewfinder and enables photographers to easily check focusing and composition. The near circular diaphragm creates an attractive blur to the out-of-focus areas which enables photographers to emphasise the subject. This lens is equipped with Sigma's own unique OS function. This system allows the photographer to use shutter speeds approximately 4 stops slower than would otherwise be possible whilst still eliminating camera shake. For Sony and Pentax mounts, the built-in OS function of this lens can be used even if the camera body is equipped with an anti-shake function. As compensation for camera shake is visible in the viewfinder, the photographer can easily check for accurate focus and ensure there is no subject movement. An internal focusing system and HSM (Hyper Sonic Motor) ensures quiet and high-speed auto focus. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images throughout the zoom range. The lens design incorporates internal focusing and zooming systems, therefore the overall length of the lens does not change during focusing and zooming, ensuring convenient handling. The inner focusing also eliminates front lens rotation making the lens particularly suitable for use with circular polarising filters and the supplied petal-type hood. A minimum focusing distance of 30cm (11.8") throughout the entire zoom range and maximum magnification ratio of 1:4.1 makes this lens ideal for close-up photography

Box Contains

  • Sigma 18-50mm f2.8-4.5 DC OS HSM
  • Lens Hood
  • Front and Rear Caps
  • Instruction Manual
  • 1 Year Warranty Card


  • Customer Questions & Answers

    Customer Reviews

    There are no customer reviews yet on Amazon.co.uk.
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    Most Helpful Customer Reviews on Amazon.com (beta)
    Amazon.com: 4.1 out of 5 stars  103 reviews
    66 of 67 people found the following review helpful
    4.0 out of 5 stars A mixed bag but an overall win especially for the price 7 April 2010
    By John W. Griggs - Published on Amazon.com
    Verified Purchase
    I'm using this lens on a Nikon D200. After destroying my 18-200mm Nikon VR I wanted a cheap "walkabout lens" that I could risk destroying as I do a lot of industrial shooting where it's easy to whack a lens.

    I bought this lens despite some less than glowing reviews. I really liked the self-contained design where nothing changes length when zooming or focusing. I also liked the idea of it being f/2.8 at the wide end.

    This lens has a boatload of chromatic aberration at wider settings which is it's chief drawback. I use Lightroom 2.6 and it's perfectly correctable which enhances its wide end sharpness as well. This lens is sharp enough at all zooms stopped down just a little. It's really quite a surprise. I wouldn't try to make billboards with it, but it should print up to 12x18 with a little care in shooting. The optical stabilization on mine is really very good and I'm impressed with how far it allows me to push the shutter speed on still life shots.

    Like most inexpensive wide lenses, it shows corner softness and vignetting at wide settings but this can actually be used to push the viewer into the center of the shot, or vignetting can be corrected in post. Wide open at 50mm (it's full zoom limit) it's soft all over but sharpens up by even F/5.6 on my copy. Not bad since most lenses in this price range are already F/5.6 at this zoom and have to be closed further to get any sharpness at all.

    I have a number of Nikon and Sigma lenses and this one sits on my camera almost all the time. I've grown to know and trust it in just the short time I've had it. The autofocus has been very good in low light -- contrary to some reviews I've read elsewhere -- and I have to say this lens is easy to like once you understand its limitations.

    For the very low price this lens sells for and the features it has (non-rotating filter mount, internal zoom and focus) it's a very attractive lens for a shooter like myself.
    48 of 51 people found the following review helpful
    5.0 out of 5 stars Excellent lens for an amateur photographer on a budget! 23 Aug 2009
    By N. J. cruz - Published on Amazon.com
    Verified Purchase
    I'm an amateur photographer, whose pictures are taken indoors, with no flash. I could not afford higuer-end class just yet, so I opted for this lens, knowing that 18mm, it gives you f2.8. That is pretty awesome. IT works fantastic and smooth. From the beginning, my photos came out pretty sharp, thanks in part to the Optical Stabilization offered, something that other brands cannot offer for that price.

    Strongly recommend this lens for your everyday photos. Outdoors and indoors. It is not heavy, it is fast, sharp, and practical.
    19 of 20 people found the following review helpful
    5.0 out of 5 stars Spectacular replacement lens! 30 Nov 2009
    By Patrick Offord - Published on Amazon.com
    Verified Purchase
    As a walk-around lens I really did try to think of the best overall lens that I would want. I recently purchased another Canon body (450D) and instead of getting another 18-55 canon kit lens I opted instead to purchase body only this time. I then did my homework on which lens I thought would be best. Looking at the 18-100+ lenses, the 18-200+ lenses, and the typical overpriced L lenses really put things into perspective for me. I love the range of the kit lenses but REALLy wanted a better quality piece of glass, silent AF, and NO lens extension while zooming. This lens fit the bill perfectly! The fact that Sigma not only made the ultimate kit lens upgrade, but also included the petal hood as well for $300 really made me think about my next purchase and Canon.

    Canon wants too much money for their lenses and unless you pay the high price for an L lens you don't even get a lens hood! ENOUGH ALREADY! I am sold on Sigma quality and will continue to support them for my future lens purchases. I have now shot over 3,000+ images with this lens and I have only tossed around 15 total.
    [...]
    Extremely Sharp, accurate color, little to no chromatic issues, fast, and sturdy. Buy this lens, you wont regret it!
    28 of 32 people found the following review helpful
    5.0 out of 5 stars A superior lens 24 July 2009
    By Jerry Massey - Published on Amazon.com
    Verified Purchase
    Test photos made with this lens on a Canon XSI were beautiful.
    The photos showed no chromatic abberation or edge distortion.
    The colors were true and images sharp as a tack. Depth of field was excellent due to the large aperature.
    Large blow up of text revels sharp edges. I would recommend this lens to anyone who likes good quality and price value.
    10 of 10 people found the following review helpful
    5.0 out of 5 stars Solid performer at budget price 24 Oct 2010
    By K. lee - Published on Amazon.com
    Verified Purchase
    Pro: Stabilizer works very well, built quality is very good, hood fits like a glove.

    Con: Focusing is a hit or miss at wider aperture, it's more so than my F2.8 constant Sigma($500), especially at wide end of the zoom.

    verdict: can't really complaint about the lens at this price point, it's ten time better build than the NIkon VR 18-55(which i had), and 18-55 Canon IS(which I used), the extra stops is very helpful in some situation.
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