淘宝上淘了个二手镜头：MC Cosmicar 70-200/F4，发现国内关于这个镜头的资料极少，这是国内论坛上找到的关于这个镜头的少有的一点资料：
　　“MC Cosmicar 70-200/4，最小光圈32，11片9组，光圈叶片8，放大率，最近对焦0.7米，重680克。”

　　Google上找了很久，整理一些资料上来。
　　维基百科http://en.wikipedia.org/wiki/Pentax_K_mount：

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Cosmicar is a division of Pentax, it commercialized video lenses, but some were released for the k mount.
Cosmicar 28-80mm f3.5-4.5
Cosmicar 70-200mm f4
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　　Cosmicar是宾得生产电影镜头的部门，目前知道的Cosmicar的K卡口镜头似乎只有这两款。
　　以下有Dpreview.com上大家对这个头的几个评价，摘录两个：

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I have come to appreciate this lens a great deal in the last month and a half. I took it on a trip to Oregon and really had a good time with it. It is quite sharp and contrasty, has a built in hood, and does not extend when zooming (it is a push pull type but doesn't seem to have any dust inside at all. It even has a small built in hood, and a Macro Focus setting, which says 1:2 but magnifies significantly less than my Sigma 17-70 (which is 1:2.3). After many years of use it is a little loose but everything still moves fine, and the focus ring is smooth and lightly damped and quite easy to focus, it works well for focus trap, though I am still getting used to how this works. (Again Thanks Ron, for your posts on how to do it!)

In 2005 I bought my brother an *istDS and gave him the choice of my Pentax Takumar 70-200/4 or the Cosmicar 70-200/4. he tested them for a couple of days and then chose the Cosmicar 70-200/4 lens. He told me that it was much sharper and had more character....whatever that means. My tests showed that the Cosmicar 70-200/4 was on par with my SMC Pentax-A 70-210/4 and that is a pretty good lens IMO.
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　　总结其他人的评价，这个头机械结构类似Pentax-A 70-210/4，不过镀膜不同。Pentax-A 70-210/4的微距在210mm端，而Cosmicar 70-200这个头的微距端在70mm端。变焦方式为内变焦，密闭性强，极少有灰。这个头成像锐利、对比度高，在某些情况下成像质量甚至好于Pentax-A 70-210/4。
　　按照惯例，以下上样片（摘自Dpreview），自己拍的片慢慢再补上。

随意拍一张，四楼往下拍，收了一档光圈，200mm端手持拍摄，看看分辨率。下图为百分百截图。

最大光圈，70mm端微距。

小三角 5楼forsun1015

随意拍一张，四楼往下拍，收了一档光圈，200mm端手持拍摄，看看分辨率。下图为百分百截图。

不错 就是手动变焦很辛苦的

小三角 6楼forsun1015

最大光圈，70mm端微距。

的确相当辛苦。还好这个镜头A档可以用，不需要手动测光。

夜景一张，2s快门，架子勉强撑得住这么重的镜头。

最大光圈微距拍K1000.

小三角 9楼forsun1015

夜景一张，2s快门，架子勉强撑得住这么重的镜头。