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Exclusively designed for use with digital Single Lens Reflex (SLR) cameras.
High zoom ratio 11:1
Compact and Lightweight construction with diameter of 70mm (2.8"), length of 78.1mm (3.1") and weight of 405g./14.3oz.
Minimum focusing distance of 45cm (17.7") at all focal lengths
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This high zoom ratio lens is exclusively designed for digital SLR cameras and capable of covering a wide range of focal lengths from wide-angle to telephoto. Two Special Low Dispersion (SLD) glass elements and two hybrid aspherical lensesoffer the utmost correction for all types of aberrations, and enables this extended range super zoom lens to be housed in a compact and lightweight construction of 70mm (2.8") diameter, and 78.1mm (3.1") in length, and weighing just 405g/14.3oz. The new lens coating reduces flare and ghost, which is a common problem of digital cameras and also creates an optimum color balance. This lens has a minimum focusing distance of 45cm (17.7") at all focal lengths and has maximum magnification of 1:4.4. The lens design incorporates an inner focusing system, which prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal shaped lens hoods. The overall length of the lens does not change during focusing, ensuring convenient handling and ease of use. Azoom lock switch eliminates 'zoom creep' during transportation, a convenient addition when traveling.
Most Helpful Customer Reviews
Reading reviews is a crap shoot. You know nothing about the reviewer or the use of the product. That said, I am assuming you are not a struggling professional trying to shoot a high quality, tight-budget job. You are a user looking for one lens to carry to cover a wide range of service.
I'm a pro. I have a many bodies and L lenses to use.
I carry an XSI with THIS Sigma 18-200mm non OS lens just about everywhere I go. It is a great vacation tool, where most pix are shown in a digital frame or are never going to be more than 4x6.
Yes, the MTF is not great (simply: contrast across the lens), there is some chromatic fringing and watch out! the lens hood will cause vignetting and shadows with a flash at wide angle. I've been using this lens since it was released in early '05.
It's a $300 lens. Does it compare to a $1500 L lens? Yeah - very badly. So what? The first rule of photography is get the picture. Missing the shot while changing lenses is...
I agonized over the decision about whether to buy the Sigma AF 18-200 DC OS. The on-line sites (such as dp) showed softness at the edges, particularly with the f-stop wide open. There were criticisms about the focus ring being easy to confuse with the zoom ring. There were complaints that the optical stabilization isn't state of the art. I bought it anyway because I was looking for a super zoom that could do wide angle, but also go all the way to decent telephoto in a single lens and offered optical stabilization so those telephoto lengths would be usable hand held and couldn't afford Nikon's offering in this focal length range. I have been tremendously impressed with the Sigma AF 18-200 DC OS. The optical stabilization is quite dramatically noticeable and makes a big difference. Low light shots in the 18-55mm range that I would never have got away with with my kit lens are distinctly do-able with the Sigma - despite it's extra bulk. Telephoto shots in indoor lighting...
I buy many products based upon reviews from other users. That is also the case with this lens. I bought my Nikon D40 about 3 months ago (after 10 years of using point and shoots, including my treasured Canon S2is super zoom), with the kit 18-55mm lens, plus I bought a Nikon 55-200mm VR lens. I love the VR lens, but traveling through Europe for 2 1/2 weeks proved to me that I HATE changing lenses. It's inconvenient and potentially contaminates the inside of the camera body. So, I started looking around at something that I could use as a single walk-around lens. I love the wide angle perspective of the 18mm end, plus needed at least 200mm for the telephoto end. I liked the idea of Tamron's 18-250mm, but it's not image stabilized, which is really essential at the telephoto end. So, back to the Sigma. I read Camera Labs review of the non-stabilized Sigma 18-200mm, and it was favorable. So, I figured that the new stabilized version would be at least as good, and probably...
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