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)， hd%Fnykq  
我是菜鳥(niǎo)，所以問(wèn)的問(wèn)題都很淺顯。 %rL.|q9
 
    一個(gè)初始結(jié)構(gòu)例子：變焦距虛焦面目鏡， N2^=E1|_  
E.F.L=10~20   B.F.L=-14.53~-6.33  Φ出/2=1.2～2.3  F.A.=±25°~±18° UNu#(nP  
_7Ju  
序號(hào)         r                       d                 n                           ν 99e.n0  
1            47.3                  1.76             1.7552              27.5 S6Q  
2           15.5                    6.22             1.64                 60.1 e5ZX
 
3            -23.105               ***1 JzQ_{J`k  
4             25.7                    3.26           1.60311            60.7 6jD=F ^jw  
5             -900.522             0.2 _$E6P^AQ  
6            40.95                   4.69             1.72916          54.7 l`