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Sigma 18-250mm f/3.5-6.3 DC OS HSM IF Lens for Canon AF Digital SLR Cameras by SIGMA
Digital Photo Product DetailsManufacturer: SIGMA Model: 18-250mm Canon Color: black Product features: - Equipped with Sigma's own unique OS (Optical Stabilizer) technology
- Four SLD elements and three Aspherical lenses provide high image quality throughout the entire zoom range
- Minimum focusing distance of 45cm/17.7 inches and a maximum magnification of 1:3.4 makes it ideal for close-up photography
- Super multi-layer coating reduces flare and ghosting
- For Canon digital SLR cameras
Accessories:
Digital Cameras Photo Reviews of Sigma 18-250mm f/3.5-6.3 DC OS HSM IF Lens for Canon AF Digital SLR CamerasCustomer Review: Sigma 18-250 Canon Mount - good quality/price Summary: 4 Stars
I was hesitant when it came to this lens. I have had Sigma lenses for >10 yrs and liked them, but found little to know information about this lens and was leaning toward the Tamron 18-275. The Sigma was about $30 less and I have never had trouble with my 3 other lenses. I even had Sigma replace one whose chip did not play well with my 20D, so I feel some loyalty to them. On preliminary use, it is about a pound and feels solid, and well made. Some complained about the mechanism being tight about half way from 18-250, I did not find it any more tight then my 28-70 or my 70-300 both by Sigma. The images are sharp generally except for the extremes on either end, so I will just avoid the very end of each side of the zoom range. I have not put the stabilization to the test yet, from what I can tell it does add about 2 stops and makes the hand held shots passable at longer focal lengths that would not have worked with out it. The other bonus is the rapid focus and quiet operation of the HSM.
The one trade off and the reason for 4 vs. 5 is the weight. I have an 18-200 that does not have stabilization and the images at full or near full zoom are not so crisp (not the fault of the lens, but my not so steady hands). I always keep a monopod with me to minimize the shake, but this is not so convenient, so theOS is the reason behind the new Sigma. I understand the trade off for sharp pictures is some extra mechanics, but, it Sigma is reading this, shedding a little weight in the next version will go a long way. My only other comment is the f6.3 make it a bit dark at the high end of the zoom, again, trade offs are needed. If you use this outside you should be fine, but inside at a school play you may still need the monopod (got mine from REI - it is walking stick that has a removable head where you can attach your camera for about $60! REI Hiker Shock Light Staff) Over all I am very happy with another Sigma lens. and my next lens will be a 30 mm f1.4 prime sigma!
Follow up 30 May 2009 - I had some more time to use the lens and found the OS works very well. I will post some images, but hand held at 1/15 gives a nice crisp image at f5.6. I don't have the most steady hands in the world and these shots at 250 mm would never have been worth anything before the advent of OS for hand held shots. Other shots in the 18-80 range are nice and sharp from about f5.3 and up. Very happy and with 17th St. Photo as well, very fast shipping and easy to deal with. Great lens for the money
Description of Sigma 18-250mm f/3.5-6.3 DC OS HSM IF Lens for Canon AF Digital SLR CamerasThe SIGMA 18-250mm F3.5-6.3 DC OS HSM incorporates Sigma's original anti-shake compensation function, with a 13.8 times zoom ratio. For the camera have anti-shake function in the camera body, this lens's Hybrid Optical Stabilizer provide not only anti-shake function for the camera body compensation, but also provide the function to compensate the image shaking in the view finder of the camera like anti-shake compensation built in the lens. Incorporating four Special Low Dispersion glass elements and three Aspherical lens elements provides excellent image quality throughout the entire zoom range. This lens has a minimum focusing distance of 45cm (17.7 inches) at all focal lengths and a maximum magnification of 1: 3.4 reproduction ratio, making it ideal for close-up photography. An inner focusing system eliminates front lens rotation, making it suitable for use with circular polarizing filters and the supplied petal-type hood. Incorporating super multi layer coating reduce the ghost in the backlight photography.
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