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Sigma 105mm f 2.8 EX DG Medium Telephoto Macro Lens for Canon SLR Cameras

Sigma 105mm f 2.8 EX DG Medium Telephoto Macro Lens for Canon SLR Cameras List Price: $640.00 $479.00 At Amazon on 5-26-2011.

Compact and lightweight medium telephoto macro lens. Optimized image quality for Digital SLR cameras. Maximum magnification of 1:1 Focus Limiter Switch that limits the AF range so improving the speed and accuracy of auto focus Dual Focus DF system that is designed to make the lens easy to hold during auto focusing Amazon.com Product Description Optimized for Canon digital SLR cameras but also compatible with film SLR cameras, the Sigma 105mm f/2.8 medium telephoto lens allows a greater working distance between the lens and the subject, helping it excel in all shooting ranges. The increased working distance of the lens is ideal when taking the picture of a flower among several branches, or an insect on a leaf. The narrow angle of view helps simplify the background, while the shallow depth of field makes it easier to handle the composition. The lens also offers a super multi coating that reduces the flare and ghosting that tends to occur when using digital SLR cameras, helping create crisper, sharper photos. And thanks to the Dual Focus (DF) system, the lens is easy to hold during autofocusing, but also offers smooth and positive action should you choose to focus manually on images. Other features include a minimum aperture of f/45, a screw-in lens hood that supports the use of circular polarizing filters, and a minimum focusing distance of 12.3 inches. Offering a 35mm equivalent field of view of 178mm on a digital SLR camera, the lens carries a one-year warranty. Specifications Focal length: 105mm Maximum aperture: f/2.8 Lens construction: 11 elements in 10 groups Angle of view: 23.3 degrees Number of diaphragm blades: 8 Minimum aperture: f/45 Minimum focusing distance: 12.3 inches Maximum magnification: 1:1 Filter size: 58mm Corresponding AF mounts: Canon Dimensions: 2.9 inches in diameter and 3.8 inches long Weight: 16.1 ounces Warranty: 1 year When I first started looking for a mid-level macro lens, a few weeks ago, I was naturally drawn first to the Canon 60mm, as I have already have 2 Canon bodies. But then I started looking around, reading reviews (mostly on Fred Miranda's site), and comparing prices. The more research I did, the more appealing this lens became. And finally, I decided to go with it. Here's why: - The price is similar to the Canon 60mm. - I already own a Sigma EX-series lens (17-35mm), and really like it. I like the matte finish, and the glass is excellent. - For some reason I cannot fathom, Canon doesn't include lens hoods with any of the mid-range lenses I looked at. Sigma does. - The greater focal length means I can stay farther from the subject - minimum focus distance is about 30cm (12in). This is almost always a benefit. This lens isn't perfect, however, and here's a few caveats you may want to consider before making a purchase: - In low light (ie, most macro photography), this lens likes to hunt. Which can be a slow process considering its length when fully extended. Personally, I don't mind manual focus all that much, so this doesn't bother me. - This is a not an HSM (Sigma's version of USM) lens. It is motor-driven. This might bother you, but I barely even notice it. - Switching to/from manual/autofocus mode is a 2 step process. Beside the switch on the side of the barrel, the focus ring requires a push-pull motion which is sometimes a bit tricky. With a little practice, this becomes less and less of an issue - and if you leave it on manual most of the time (as I do), you seldom have to worry about it. - The lens hood is a screw-in, not a twist- or clip-on model. This is, however, offset by the rather deep recession of the glass in the lens tube. (If you want to use the lens hood and leave it on, a 77mm lens cap will fit it.) Despite these (in my opinion, very minor) problems, I'm very happy with this lens, and would definitely recommend to anyone looking for a mid-level macro lens Back To Top Sigma 105mm f 2.8 EX DG Medium Telephoto Macro Lens for Canon SLR Cameras Available from Amazon Price: $479.00 Updated on 5-26-2011.

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