g*z
5 楼
据说有个Tokina f/2.8 11-16mm似乎更好
C*I
16 楼
I got a Sigma 17-50mm F2.8 $669
It is very good.
Here is some review for that lens:
http://www.lenstip.com/256.11Lens_reviewSigma_1750_mm_f_2.8_EX_DC_OS_HSM_Summary.html
In the frame centre the Sigma behaves better than more expensive
constructions of Canon and Nikon. At the edge it is worse than the Nikkor
but it can compete on equal terms with the Canon. In fact it doesn’t lag
behind the competitors in any category and in some it fares definitely
better. Sigma lately has started to emphasize the fact that its aim is not
only to produce cheap and worse substitutes of brand name lenses but also to
reach a similar price-quality segment as its brand name competitors. The
newest models, like the 1.4/50 or the Sigma 17-50 mm f/2.8 tested here, are
perfect examples of this strategy.
The Sigma 17–50 mm is not a flawless device but neither are so its most
serious competitors which are more expensive. The Nikkor overall seems to be
an optically better lens but it is much more pricey than the Sigma and
doesn’t feature image stabilization. The optics of the Sigma and the Canon
are very similar – both boast silent and quick autofocus mechanism and
stabilization. Sigma’s advantage consists of a better warranty and a bit
lower price
It is very good.
Here is some review for that lens:
http://www.lenstip.com/256.11Lens_reviewSigma_1750_mm_f_2.8_EX_DC_OS_HSM_Summary.html
In the frame centre the Sigma behaves better than more expensive
constructions of Canon and Nikon. At the edge it is worse than the Nikkor
but it can compete on equal terms with the Canon. In fact it doesn’t lag
behind the competitors in any category and in some it fares definitely
better. Sigma lately has started to emphasize the fact that its aim is not
only to produce cheap and worse substitutes of brand name lenses but also to
reach a similar price-quality segment as its brand name competitors. The
newest models, like the 1.4/50 or the Sigma 17-50 mm f/2.8 tested here, are
perfect examples of this strategy.
The Sigma 17–50 mm is not a flawless device but neither are so its most
serious competitors which are more expensive. The Nikkor overall seems to be
an optically better lens but it is much more pricey than the Sigma and
doesn’t feature image stabilization. The optics of the Sigma and the Canon
are very similar – both boast silent and quick autofocus mechanism and
stabilization. Sigma’s advantage consists of a better warranty and a bit
lower price
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