http://6328.spaces.live.com/?_c11_BlogPart_BlogPart=blogview&_c=BlogPart&partqs=cat%25E5%2586%2599%25E5%259C%25A8%25E9%25A1%25B5%25E8%25BE%25B9%25E7%259A%2584%25E7%25AC%2594%25E8%25AE%25B0en-USSat, 17 May 2008 08:21:50 GMTSat, 17 May 2008 08:21:50 GMTMicrosoft Spaces v1.1http://www.rssboard.org/rss-specification60http://6328.spaces.live.com/blog/feed.rssblogcategory13470044746363567976328http://6328.spaces.live.com/Blog/cns!12B1856ED58FCCBD!223.entry<p>　　Petzval镜头有两种基本的结构类型，Petzval和Dallmeyer。它们的像差特性略有区别，如下图所示。左边的Petzval结构利用了OSLO内置的DLS优化和Silder，右边的Dallmeyer结构只用了手工计算。即使这样，也仍然可以清晰的看到它们之间的不同。 <p> <img height=500 alt="Petzval_Dallmeyer" src="http://static.flickr.com/53/195391407_fa7e44b973.jpg" width=497><img src="http://c.services.spaces.live.com/CollectionWebService/c.gif?cid=1347004474636356797&page=RSS%3a+Petzval%e5%92%8cDallmeyer%e7%9a%84%e4%b8%8d%e5%90%8c&referrer=" width="1px" height="1px" border="0" alt=""><img style="position:absolute" alt="" width="0px" height="0px" src="http://c.live.com/c.gif?NC=31263&amp;NA=1149&amp;PI=73329&amp;RF=&amp;DI=3919&amp;PS=85545&amp;TP=6328.spaces.live.com&amp;GT1=6328">http://6328.spaces.live.com/Blog/cns!12B1856ED58FCCBD!223.entry#commenthttp://6328.spaces.live.com/Blog/cns!12B1856ED58FCCBD!223.entrySat, 22 Jul 2006 15:29:49 GMT1blogentryblogentryBlog entryhttp://6328.spaces.live.com/blog/cns!12B1856ED58FCCBD!223/comments/feed.rsshttp://6328.spaces.live.com/Blog/cns!12B1856ED58FCCBD!223.entry#comment2006-07-22T17:54:50Z