this is the best one of the long zoom range lens avairable in second market. in fact it is much better than such as 70-300 F4.5-5.6 D. in the other hand this len was designed by Leica following MD version. best value for Minolta users. in European market, you can find very good one for £80!

1. F4 it is the best point for such kind zoom lens, you can reference from Canon 70-210 F4 len as well.the build quality also very good, most of materials are matal.
2. internal zoom, it means that the size is not changing when zoom out. good desigh.
3. best value for second hand

too heavy if you compared with the new version, because the material is completely different(about 700g).

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基本可以的镜头，有人说MD版的是徕卡设计的。
前期的镜头是金属遮光罩的，后期的是塑料遮光罩，后期的镜头有镜头桶，前期的不好说，也有人没有的。

小巧，轻便，全金属镜筒，当然对焦距离窗和变焦环是塑料的；成像质量在这个档次的镜头中算是比较好了，况且能比较容易的买到便宜的二手，成色也不错。是个初级、中级用家比较超值的选择。也比较实惠。

200端的眩光控制和反差都要低一些，即使加上遮光罩；全金属的结构导致了对焦速度比较慢，对焦行程也比较长，这些都是AF不够快的因素，当然考虑原型镜头是MF版的，只是经过了重新设计AF化，对焦行程长也就是可以知道原因的了。
缺少一个脚架环，也许那会的设计还不会在这个焦段的镜头上加这个玩意，但是没有脚架环，在三脚架上是有点头重脚轻的感觉。

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