打算买sigma 8-16，但是由于地点限制，不方便去实体店够买，估计近期只能选网购，请问买过的大大，有遇到跑焦的问题么？

这么小光圈的镜头还担心跑什么焦？

我当时试了俩，选了个跑的少的，因为我机身本来就跑。

我的死马18-250就完全不跑啊，通过测试卡了

死马的东西不值得买。(下帖被删二次，被封一次)
/thread-934785-1-2-1.html

图丽评测：
原文在：http://www.photozone.de/canon_eos_ff/595-tokina162828eosff?start=1
We are pretty sure that consumers, especially in the mid-to-high end market, would be happily willing to pay a little more for better quality control. Especially ultra-wide and standard lenses show more outliers than desirable - not only among Tokinas but across the manufacturers (e.g. recently we tested 3 (three!) Sigma 8-16mm f/4.5-5.6 in Nikon mount without success). We are probably seeing negative outliers in excess of 25%(!) in this segment which is, frankly, embarrassing and unacceptable!
这话大意：不仅图丽质控做得不好，死马也这样。我们（指photozone的测试者）测了三个死马8-16 f/4.5-5.6 尼康口镜头，但没有成功！我们大概看到死马、图丽的产品比其它产品的异常值超出了25%。

死马有不跑焦的头吗？不过超广跑焦也无太大影响…… 本帖最后由 verdancy 于 2012-1-16 09:16 编辑