theoretically keep the 长焦/广角端=3左右to ensure

回答: testing results from magzine "practical photography"sqllsq2007-12-08 20:19:31

image quality if you are a serious amateur.

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这么说18-200是一不好的选择。 -perters- 给 perters 发送悄悄话 (139 bytes) () 12/09/2007 postreply 07:36:38

I would recommend Sigma 18-200mm OS instead of the non-OS versio -pieq314- 给 pieq314 发送悄悄话 pieq314 的博客首页 (509 bytes) () 12/09/2007 postreply 19:07:25

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