I've tried three copies of this lens. Two from Amazon. Both have significant front focus problems between 30-50mm focal length. It makes the close up "macro" functionality useless. Portraits at f/2.8 are useless because nothing looks like it's in focus. This is a huge disappointment because this is the only lens that I know of in this price range with a 2.8 constant aperture and HSM. I've sent both copies back. I also went to the local camera store in SF here, Calumet. They had one in stock. I tried it out and it front focused as well. It was definitely the closest one to being correct though, but still not acceptable. I'm giving up on this lens and saving up for the Nikon 17-55. Sigma says it can take about 3 weeks for a calibration, which pushes me awfully close to the return policy from Amazon. If it gets delayed for any reason and I can't return it to Amazon I'll be stuck with a bad lens. Luckily Amazon is very helpful with returns.
(80 customers reviews)
Customers Rating=4.0 / 5.0
More Detail For Sigma 18 50mm f 2.8 EX DC HSM Macro Lens for Nikon DSLR
- A minimum focusing distance of 20cm (7.9"), a maximum magnification of 1:3
- Large aperture of F2.8 throughout the entire zoom range
- Special Low Dispersion (SLD) and Extraordinary Low Dispersion (ELD)
- Compact and lightweight lens
- Reduced Ghosting and Flare The super multi-layer lens coating reduces flare and ghost. High image quality is assured throughout the entire zoom range
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