目前是對(duì)于變焦目鏡的不理解，請(qǐng)各位大俠指點(diǎn)指點(diǎn)，我是菜鳥，所以問的問題都很淺顯。    ?*z#G'3z1  
一個(gè)初始結(jié)構(gòu)例子：變焦距虛焦面目鏡， n@xDFa  
E.F.L=10~20   B.F.L=-14.53~-6.33  Φ出/2=1.2～2.3  F.A.=±25°~±18° wNW9xmS  
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序號(hào)         r                       d                 n                           ν !0~$u3[b  
1            47.3                  1.76             1.7552              27.5 XX,iT~+-  
2           15.5                    6.22             1.64                 60.1 Eq9TJt'3y  
3            -23.105               ***1 F}A@H<?  
4             25.7                    3.26           1.60311            60.7 l   <m80e),~  
5             -900.522             0.2   _1`*&k JL~  
6            40.95                   4.69             1.72916          54.7    0=;jGh}|i  
7              -20                     1.23              1.80518          25.4 %