亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线

 

Top 10 expensive camera lenses

By Chen Boyuan
0 Comment(s)Print E-mail China.org.cn, November 8, 2013
Adjust font size:


 Canon EF 200-400mm f/4L USM Extender 1.4x US$11,799


Debuting at the 2012 London Olympics, this Canon zoom lens features an imbedded 1.4x extender, the world's first-ever attempt to place an extender inside a lens. A switch on the lens' body will enable the lens to attain a 280-560mm f/5.6 super telephoto focus.

The seemingly simple trick actually took Canon more than two years to develop. Canon even used the London Games as a platform for its perfection before eventually launching it in May of this year.

The interior structure features 33 elements in 24 groups, in addition to an ultrasonic motor (USM), which could effectively compensate for any sudden movements by four shutter stops.

Its high cost -- nearly US$12,000 -- disqualifies it from entering the popular market, perfectly matching the company's designed target users: wildlife photography fans and sports photo professionals.

<  1  2  3  4  5  6  7  8  9  10  >  


Follow China.org.cn on Twitter and Facebook to join the conversation.
ChinaNews App Download
Print E-mail Bookmark and Share

Go to Forum >>0 Comment(s)

No comments.

Add your comments...

  • User Name Required
  • Your Comment
  • Enter the words you see:   
    Racist, abusive and off-topic comments may be removed by the moderator.
Send your storiesGet more from China.org.cnMobileRSSNewsletter
    1. <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>
      <thead id="556nl"></thead>

      1. <em id="556nl"><tt id="556nl"></tt></em>
        <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>

        <ul id="556nl"><small id="556nl"></small></ul>
        1. <thead id="556nl"></thead>

          亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线 人妻无码久久影视 日韩久久久久久久久久久久 精品国产香蕉伊思人在线 无码国产手机在线a√片无灬 91在线视频无码