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发表于 2011-5-9 10:49:49
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看看这个http://www.photozone.de/canon-eos/515-sigma816f4556apsc
评价好像还不错:
Verdict
The Sigma AF 8-16mm f/4.5-5.6 DC HSM may be the new star in this lens segment. It's very sharp across the whole range straight from the max. aperture. Lateral CAs are also very well controlled. That's quite an achievement for such an extreme ultra-wide angle zoom lens! If you're into architecture photography you will notice some barrel distortions when using the 8mm setting but that's actually a general problem in this class and at 12mm it shows less distortions than the competition actually. The biggest issue is the amount of vignetting at the widest setting but that's not really a surprise because the inherent amount of natural vignetting is unavoidable at such extreme focal lengths. However, it's still a good idea to avoid the max. aperture to tame the light fall-off to some degree.
The build quality of the Sigma lens is very good although some may not like the vulnerable "bulb"-like front element which prohibits the use of filters. The AF is both fast and nearly silent. The pricing of the Sigma is very attractive relative to its performance figures as well as the extreme nature of the lens. Therefore ... highly recommended (if you can find a good sample)! |
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