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This high ratio zoom lens incorporates Sigma`s original OS (Optical Stabilizer) function and exclusively designed for digital SLR cameras. It is perfectly suitable for low light conditions, indoors, at dusk and telephoto range. SLD (Special Low Dispersion) glass and aspherical glass provide excellent correction for all types of aberrations. This lens has a minimum focusing distance of 45cm (17.7) throughout the entire zoom range and has a maximum magnification of 1:3.9. The inner focusing system is suitable for using a petal-type lens hood supplied and also circular polarizing filters.
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Technical Details
- 18-200mm high-zoom-ratio lens designed for Canon digital SLR cameras- 2 Special Low Dispersion (SLD) glass elements and 2 hybrid aspherical lenses
- Lens coating reduces flare and ghost; 17.7-inch close focusing distance
- Inner focusing system is suitable for circular polarizing filters and lens hoods
- Measures 2.75 inches in diameter and 3.07 inches long; 1-year warranty
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By Edna C. Burns (Washington, DC)
I was so eager to get a multi range lens(sort of a everyday carry around)that would keep me from constantly changing lens between shots, but I quickly found out that this lens was not for me. The shots were very soft focused and often presented some vignetting and dark spots. Also the lens seemed to have a hard time finding it's focus. I just was not happy and did not want to be stuck with this lens. I simply did not think it was a good investment, so after three weeks, I decided to contact the seller for a refund. The seller was not at all happy about refunding my money. He sent me a "not so pleasant" email which I thought was totally unnecessary. I had to get Amazon involved to get my money back and of course I paid the cost of the return shipping. I will make sure I stay away from this particular seller and lens in the future.
By Tiffany Ann (Black Diamond Bay)
Beauty is in the eye of the beholder and so, I think, is one's opinion of a camera lens. I've learned over the years that lens reviews are helpful, but they are just opinions. Yes, for sure, you generally get better optics with more expensive lenses, but it's certainly not a guarantee. And for reasons one can only wonder about, oftentimes two copies of the same lens will produce very different results. For example, my friend Sara, who is as nuts about buying (we're like compulsive buyers) and using Canon lenses as I am about buying and using Nikon ones, has a Canon EF-S 18-55 kit lens that produces images so tack sharp through its whole range that would make you cry.
And so it goes with super zooms, these wonderful lenses that go from pretty wide to very long. If you look at the reviews of any of them, some people claim horrible results, while others scratch their heads, because they're just loving them to death.
My first superzoom was a Sigma 18-200 which I got about five years ago and I was blown away with what I could do with just one lens. Plus my shots were pretty darn sharp. The lens was more expensive then, than it is now. It's still a good lens, it weighs a couple ounces less than a pound and if I only could have been satisfied, I'd have saved a bundle of money. Ah well. Anyway, I had an opportunity to try out the Tamron 18-200 as well back then, but I decided on the Sigma. It was a coin toss. At the time I thought both lenses would be good general, all purpose, walkabout lenses. They wouldn't be as sharp or fast as primes and wouldn't be as light as shorter zooms, but heck, one lens which went all the way from 18 to 200mm (okay 27 to 350mm in the real world), such a deal.
Both lenses were five star lenses as far as I was concerned, both still are, because they are what they are, a very good compromise. If you're expecting a lens that will reach out across a dark night and grab a shot of lovers making out by the beach, then you don't want these lenses, but if you're looking for a good general walkabout lens, both will suit you and they won't break your bank.
But they don't have image stabilization and when Sigma came out with it, I had to have it. So I shelved the Sigma zoom I had, (thankfully I didn't sell it) and bought the Sigma 18-200 OS and Sigma's Optical Stabilizer worked great. I got sharper handheld shots in lower light, but they came at a price, almost half a pound. It doesn't sound like much, eight ounces (7.6 to be exact), but try carrying it around on your shoulder all day long. I really noticed the difference, especially when I was shooting.
I probably wouldn't have gone to that auction site with my fairly new lens, if it hadn't been for Tamron. They came out with their Tamron 18-250 and I had to have it. A bigger reach, the heck with image stabilization. Not only could I go all the way from 27 to 375mm in the real world, but I got back a bit over six ounces, the lens was lighter. So now I had two super zooms, which was good, because I go out people shooting with my sister a lot.
So one would think I'd be satisfied, but when the Nikon 18-200 came out, well Nikon optics in a superzoom. I had to have it, so the Tamron went up for auction (because I just loved the Sigma, even though it didn't reach as far). The Nikon lens focused faster, but not that much faster then the other two, had image stabilization and was faster at the long end and it took great shots, but it weighed more than the other lenses, coming in at a whopping 20 ounces and it was creepy, creepy, creepy and with no zoom lock. The other lenses had almost no zoom creep and they had a zoom lock, which I never used. Very annoying the zoom creep was, still, great shots from a great lens.
Satisfied, well for awhile, then came 2008 and the Tamron 18-270 with their VC version of image stabilization and up for auction went my expensive Nikkor lens. Yeah, I still hung on the my first super zoom, the Sigma. For sure the Nikkor was a five star lens, but a girl can't justify more than two super zooms at any one time.
The Tamron lens actually weighed a fraction less than the Nikkor it replaced. It was a bit slower on the long end, was a bit stiff in the zooming, but easy to get used to and almost no, sometimes no, zoom creep and it has a lock. It's just simply one heck of a lens. Sometimes it's a bit slow to autofocus in lowlight, but still I think it finds its focus faster than I would, but not as fast as the Nikkor.
I should add here that Nikon has upgraded their 18-200 adding a zoom lock. I've played with one and not only have they added that zoom lock, but it doesn't seem to creep nearly as much, but that could just be the copy I used. I should also mention that Sigma has come out with their Sigma 18-250 OS which I was lucky enough to use for a month. That is just one super fine lens. It focuses fast and I think it finds its focus better in low light than the Tamron 18-270. Also this new Sigma has a super quiet motor, though I've never really been bothered by the sound of a focusing lens.
By reading other reviews of these lenses, I've learned that they are all subject to zoom creep, so I suppose in the main, I've been lucky. All of these lenses are very good, at least all of the copies I've used. I wouldn't hesitate to recommend any of them. However, if you go with Nikon, you're going to be paying an awful lot more. You get a slightly faster lens on the long end and you get Nikon quality, but Sigma and Tamron give quality as well and Tamron warranties their lenses for six years, so they're pretty confident that they're building a great product (and now they're part of Sony).
So through my whole super zoom experience, which one do I wind up using the most? You guessed it, that Sigma I bought five years ago. Like the proverbial Timax, "It takes a lickin' and keeps on tickin'." If the day is bright and I'm going people shooting it's the one I put on my camera, because it's light and it's images are true.
By A. Fisk (Council , ID USA)
I was looking for an all around lens that was versital enough that I could use it in a lot of different picture situations. I was always having to change lenses constantly between a telephoto lens and a wider angle lens for family events. Ever sence buying this Sima 18mm-200mm lens I really haven't taken it off my Canon T1i. I haven't noticed the dark corners like some have said. I still have a lot to learn as far as useing it the best way with the camera but it's been a blast so far. I love it and haven't had any problems what so ever. I really like the wide angle with it retracted and it has a pretty good zoom to get you close up. I would sudgest you always get a UV filter to protect the lens because it is so worth it. Good luck and have fun with this lens.
By B. LaGarde (Kansas City)
I purchased this lens used about 7 months ago. I have been loving the photos that i was getting both macro and portrait but this review is about outstanding and exceptional customer service. I'm going to have to sacrifice a little pride now and admit to something pretty careless. I was constructing a flash modifier and of course it involved a little gorilla glue among other things. I worked on the modifier most of a saturday and left it to dry while i went out on Saturday evening. When i came home i was pretty anxious to see how the modifier was shaping up so i whipped out my flash, mounted it on a bracket on the camera and slipped the modifier on over the light. After a few minutes i noticed a drop of glue on the floor and then realized that there was also some glue on the barrel of my Sigma 18-200mm lens. I fetched some goof off and cleaned like crazy and thought for sure i had everything removed. I drew the lens barrel back down and put it all away and went to bed. Well you surely know the outcome of this little tale by now. Yes, the next day the barrel was glued solidly closed. I worked and worked to free it up and only managed to break the zoom gear on top of having glued the barrel down. This stupid little mistake has been haunting me for weeks now.
Well i sent the lens off to Sigma for an estimate in mid early October. I called in mid-November and was told that the lens had been recieved and was in the queue for examiniation. Well, low and behold (its Christmas time so that seems like a particularly appropriate phrase) this morning a Fed Ex truck pulls up and delivers a small box. I flip the box over and quickly note that its from Sigma. Well all i can think of at this point is that it wasn't repairable so they have sent it back. Then what to my wondering eyes do I find? The lens has been 100% fully repaired and the enclosed ticket is marked "replaced main barrel unit courtesy n/c" Its even marked checked all - in good working order.
I just couldn't let this act of customer support go unnoted. Sigma, you rock...
By Jason Reusch (Nashville, TN USA)
I've used this lens on a Rebel XT and later a 50D. The broad range of focal lengths mean you need only carry one lens. It is fantastic when traveling.
Here's why it doesn't get a 5:
I agree with the other reviews, the AF is noisy and a bit slow
I wish it had a wider aperture
For the price and broad zoom range, these are trade offs that make sense to live with.
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Buy Sigma 18-200mm f/3.5-6.3 DC AF OS (Optical Stabilizer) Zoom Lens for Canon Digital SLR Cameras Now
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