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Sigma AF 18-200mm f/3.5-6.3 DC OS (Optical Stabilizer) Zoom Lens for Nikon Digital SLR Cameras

4.2 out of 5 stars 156 customer reviews
| 32 answered questions

Available from these sellers.
Nikon DSLR

DPReview Tested
From the experts at DPReview
Overall score: 82%
See review summary and sample images
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Gold and Silver Awards are given to products that deserve special recognition based on how well they perform relative to their competitors at the time of review.

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  • 18-200mm focal length
  • 27-300mm equivalent focal length on APS-C cameras, 28.8-320mm equivalent focal length on Canon APS-C cameras
  • F3.5-6.3 maximum aperture; F22-40 minimum
  • Micromotor-type AF motor without full-time manual focusing
  • Image stabilization, Auto panning detection
  • 72mm filters
  • 0.45m/17.72" minimum focus
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42 new from $339.00 7 used from $209.00 2 refurbished from $399.99

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Technical Details

Review summary from DPReview

DPReview Tested January 2009
This isn't a lens for pixel-peepers who demand critical corner-to-corner sharpness in every shot, but for users looking for a versatile, all-in-one travel lens within a budget, it fits the bill just fine.
Andy Westlake Andy Westlake


This isn't a lens for pixel-peepers who above all else demand critical corner-to-corner sharpness in every shot. But for more normal users looking for a versatile, all-in-one travel lens within a budget, and who'd prefer to while away their evenings looking at and sharing their images rather than post-processing them, it fits the bill just fine.

Reasons to buy

  • Huge 11x focal length range, ideal general purpose and travel lens
  • Relatively low chromatic aberration
  • Low distortion (for a superzoom)
  • Reasonably effective optical stabilization system

Things to consider

  • Inconsistent sharpness - extremely soft at 80mm
  • Soft corners at all focal lengths
  • Occasionally indecisive autofocus
  • Slightly less resistant to flare than its more recent competitors

Suggested for

Travel and everyday use, where versatility of framing and portability are more important than maximum image quality.

Not suggested for

More demanding work, where the need for optical quality outweighs more practical concerns.
Poor Excellent
Build quality
Ergonomics & handling
Image Quality
Scoring is relative only to the other products in the same category.
DPReview is the world’s most popular dedicated enthusiast digital photography website. Since 1998 its mission has remained unchanged: to deliver the best reviews of cameras and lenses anywhere on the Internet, and help you find the right gear for your needs.

Product Description

Style: Nikon DSLR

Product Description

Sigma 18-200mm f/3.5-6.3 DC OS Zoom Super Wide Angle Lens for Nikon

The Sigma 18-200mm high-zoom-ratio lens is designed exclusively for Nikon digital SLR cameras and is 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 lenses correct for all types of aberrations, letting Sigma house the extended-range super-zoom lens in a compact and lightweight body that measures 70mm in diameter and 78.1mm long and weighs a mere 14.3 ounces. The new lens coating, meanwhile, reduces flare and ghost--a common problem shared by many digital cameras--while also creating an optimum color balance. Other details include a minimum focusing distance of 45cm (17.7) at all focal lengths, a high zoom ratio of 11:1, and a maximum magnification of 1:4.4.

The lens design incorporates an inner focusing system that prevents the front of the lens from rotating, making it particularly suitable for using circular polarizing filters and petal-shaped lens hoods. In addition, the overall length of the lens never changes during focusing, making the lens convenient to handle and easy to use. Finally, the lens's zoom lock switch eliminates "zoom creep" during transport--a convenient addition when traveling. The lens, which includes a metal mount, is backed by a one-year warranty.

Product Information

Style:Nikon DSLR
Product Dimensions 3.9 x 3.1 x 3.1 inches
Item Weight 1.3 pounds
Shipping Weight 1.8 pounds
Item model number 888306
Customer Reviews
4.2 out of 5 stars 156 customer reviews

4.2 out of 5 stars
Best Sellers Rank #86 in Camera & Photo > Lenses > Camera Lenses > Film SLR Lenses
#1,190 in Camera & Photo > Lenses > Camera Lenses > Digital Camera Lenses
Date first available at October 2, 2001

Warranty & Support

Product Warranty: For warranty information about this product, please click here


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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By T. Norris on April 30, 2009
Style Name: Canon Digital SLR Cameras Verified Purchase
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 not photography. Is this the preferred lens in my arsenal? No. But for general non-client, daylight, non-sports shooting, it's the one I'll probably be using. I prefer the non-optical stabilzed version - less complexity.

To help you weigh this review: I use five professional (5D, 1D) and several prosumer (40D, 50D, XTI, XSI) bodies and nine L lenses, plus a slew of others.

Photo tip: night shooting of foreground against backround (done a lot with this lens!): typical situation: girl on beach in front of sunset. Manually set exposure to flash shutter speed, aperature & ISO to get background. Turn flash on to expose and meter foreground. You'll get some great "how did you do that?" pix. All the MTF, abberetion and linearity issues will mean nothing, because you got a picture no one else could and th L doesn't really add anything, because you want depth of field here.

Thanks for reading my review.
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Style Name: Nikon DSLR
This was shipped to my office yesterday, so I naturally had to play with it. I have an old Nikon D50, and had gotten use to the kit lens that was on it. This Sigma is CONSIDERABLY larger and heavier. I expected that of course, and maybe I'm just getting old, but IMO its a pretty hefty lens.

I bought this lens expressly for the Optical Stabilization, so that was the first thing I tested. My office has a logo painted on the far side, so I handheld, indoors, at 200mm and focused on one letter. The lens setting was f6.3 at 1/30 sec. Looking side by side at the OS and non-OS shot in the camera lcd screen, they looked almost identical.

However, puting them in Photoshop and blowing them up revealed a whole other story. The non-os picture was blurred - and no amount of sharpening in Photoshop could correct it.

The OS picture was sharp. I'm not easily impressed, but I was really surprised at how well it worked. When I enlarged it to 200 percent in Photoshop, it seemed to be a bit soft, so I applied a small bit of sharpening from the software - and ended up with a photo that looked like
it had been shot with a macro lens from 3 feet away on a tripod. It was outstanding.

I bought this lens for 2 reasons.

First I am a Realtor. All of my listings need indoor shots, and I stay away from flash if I can - natural light seems to create warm home interiors. Problem was, most of these shots ended up in the 1/8-1/15 range - so I packed a tripod around. This lens should be far more convenient.

Second, I am a photographer. I shoot a lot of weddings and reunions, and I often try to drag the shutter, especially in churches or large halls, where I want some ambient light to fill in the background.
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Style Name: Canon Digital SLR Cameras
I disagree with the previous poster. I think this lens is pretty great.

The quality is exceptional for a lens of this price and range.

There seems to be a controversy regarding how focal lengths of lenses are measured; from what I've read, the lens does go to 200mm if measured at infinity.

In the real world, the lens takes fine pics as long as you have enough light. The size and weight is perfect for a walk-around lens. My Rebel XT with this lens (and the Hakuba hand grip) is a perfect fit, and feels great to carry around and shoot. To get better optical quality at this range, you would need to get a few lenses that each cost a lot more. There is nothing quite like this, except for Tamaron's 18-200, which I hear doesn't compare favorably to the Sigma.

It seems that Sigma has quality control issues, so I would buy

the lens from a local dealer that has a return policy. Test the lens, and if you don't think it's up to par, return it for another.
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Style Name: Nikon DSLR
First impressions after having the lens for 1 week, using with the Nikon D200 (upgraded from Nikon 24-120mm VR):

1. It is loud. When auto focusing or engaging the OS function, the lens makes a chirp sound. Doesn't really matter from a performance perspective, but it is annoying.

2. Auto focus in the dark takes longer than the 24-120mm Nikon. Not sure if this is the camera or the lens, but the lens just doesn't seem happy to do the nighttime auto focus.

3. Range is amazing. From full tele to full zoom, the photos look great.

4. OS stabilization seems to work just as well as the Nikon 24-120mm VR's did.

4. For just over 1/2 the price of the Nikon 18-200 VR, no matter how much quieter/faster the Nikon is, this seems like the better value for the buck.
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