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Contrary to eBay's auto-title, this lens is for CANON EOS (EF Mount lens), Tested with Canon EOS5q 35mm. The lens mechanically is a push/pull zoom system, love it or hate it, Sigma have done an OK job with this one. The mechanism is a little stiff which can make fine grained adjustments a chore. However this does prevent (in my model at least) the zoom creep found in many push/pull lenses. Focus is easy in manual and in automatic there is no evidence of unacceptable hesitation or undue 'hunting' in AF mode. Weight wise, it is not unduly heavy but weighty enough to suggest decent construction, which regarding this is not half bad. The rubber finish makes it easy to grip and feels less frail in the hand than even some of Canon's own lenses. Regarding image quality, whilst this is certainly no top of the range lens in terms of sharpness or precision it is of a highly acceptable standard.Read full review
When all else fails, read the directions. This was my first additional zoom lens & I had gotten used to the twist-zoom feature that came with my Nikon camera. I thought this lens was broken until I decided to read the directions & discovered it has a push-pull-zoom feature. It works OK, but it's much easier & quicker to twist to the right spot with one hand than to have to move the camera & use both hands to get where you want. Maybe with more practice I can get back to one-handed maneuverability and I might rate this excellent, but for now it's good.
I'll confess that I'm not a big fan of Sigma lenses, but I've been doing a lot of wildlife (birds) photography and I needed the reach of a 300 mm lens. The Nikons were a bit to pricey for me, so when i found this Sigma 70-300 mm, on ebay, I went after it. It has been a sweet surprise for me. The lens works great on my Nikon D90 and D200, it isn't super fast on autofocus, but it's decent.The focus is dead-on, too. The images it renders are very crisp, with great color and contrast! I've made several 8x10 and 11x14 enlargements with excellent detail. The macro works very well also; I've gotten some great shots of flowers and insects using the lens, very comparable to my Nikon 105 Micro. This is one super lens and I'm glad it came into my possession!Read full review
I wanted to have a second lens to sort of play with. This lens proved to be a good choice. The zoom range is good and the macro works well. The sharpness of pictures taken at 300mm on a D80 are not as sharp as those taken with the Nikon lens I have. The lens functions well with all the settings on my D80 camera although the autofocus is a bit noisy. However, considering that the Nikon lens cost about 5x as much, this lens is a good choice even if it is the only lens you have. The macro mode probably will require a tripod. It is difficult to stop camera motion which causes fuzziness even at fairly high shutter speeds. With a tripod, all works well and I was able to take some quite sharp pictures. You might be a bit disappointed that the 70mm zoom does not give a very wide view. My suggestion is to pick up a second lens for the low zoom range. You can cover the range from about 18mm to 70mm or 135mm with reasonably priced lenses from a number of manufacturers, including Nikon and Sigma. All in all, if you are looking for a zoom lens that gives very good pictures and is reasonably priced, I think you will like this lens.Read full review
I use this lens on a Canon Digital Rebel XT (350) and for the money it can't be beat. On the Revel it gives a field of view like a 112mm - 480mm, which is very long for a lens without image stability. At the long end it is important to mount the camera/lens on a solid tripod. If you have to hand hold the lens it is best to use shutter priority with a fast shutter speed (maybe twice the mm setting - i.e. if you are at 300 use at least 1/600 or faster). The lens focuses fairly fast and accurate (less than maybe a second).