Sigma AF 18-200mm f/3.5-6.3 DC OS (Optical Stabilizer) Zoom Lens for Canon Digital SLR Cameras The Sigma 18-200mm high-zoom-ratio lens is designed exclusively for Canon 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.
Customer Review: very satisfied
I PURCHASED THIS LENS FOR MY NEW CANON XSI. IT HAS PROVEN TO BE ALL THAT IT CLAIMED TO BE. IT IS SHARP EASY TO USE & GIVES GREAT RESULTS. I WANTED AN ALL AROUND EVERY DAY LENS THAT COULD GET ME CLOSE TO A DISTANT SUBJECT WITHOUT THE INCONVIENENCE OF CHANGING LENSES. THE RANGE IS GOOD OPTICAL STABILIZATION WORKS WELL & IT IS AN ALL AROUND PLEASURE TO USE.
THE ONLY DOWN SIDE IS IT IS QUITE HEAVY & YOU MUST GET USED TO IT. THE FOCUS RING CAN BE MISTAKEN FOR THE ZOOM RING SO YOU MUST BE AWARE WHICH RING YOU ARE USING AS YOU SHOULD NOT USE THE FOCUS RING IF THE LENS IS SET TO AF AT THE RISK OF DAMAGING THE MECHANISIM. I WOULD RECOMEND THS LENS TO A FREIND
Customer Review: Excellent for the price!
I bought this lens to go with my d40 and it worked without a problem. I have since gotten the d90 and use the lens with that body again, with no problem. This could be the only lens you ever need since it does everything! This lens replaced the 18-55 and 55-200 I was using previously. The only time I change lenses now is to my 50mm f/1.8 for certain shots, otherwise this lens is always on my camera.

Of course there is no such thing as a free lunch since this lens does have a few(minor) problems. It has dark corners but it does not bother me one bit! A little adjustment in lightroom and all is fixed. It loses a LITTLE sharpness along the very edges but again, is no problem. You can not tell unless you below the pictures up to HUGE sizes on your screen. These are things that guys who only shoot test charts worry about. Just use it, take great pictures and fix any little problems in post production.

So to wrap up, I recommend this lens unless you are made of money then go with the Nikon 18-200mm .

Tags: Canon SLR Camera, Canon Digital Camera, Canon Camera

This entry was posted on Tuesday, January 6th, 2009 at 8:00 pm and is filed under Canon Digital Camera. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.