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)， 5H5<ft,  
我是菜鳥，所以問的問題都很淺顯。 +Gjy%JFp
 
    一個(gè)初始結(jié)構(gòu)例子：變焦距虛焦面目鏡， :jhJpm1Xq  
E.F.L=10~20   B.F.L=-14.53~-6.33  Φ出/2=1.2～2.3  F.A.=±25°~±18° 7_|zMk.J*  
<vAg\Tv:S  
序號(hào)         r                       d                 n                           ν 4iw+3 Q|  
1            47.3                  1.76             1.7552              27.5 ?iq:Gf
  
2           15.5                    6.22             1.64                 60.1 c-3? D;  
3            -23.105               ***1 4u;W1=+Vn  
4             25.7                    3.26           1.60311            60.7 PeG8_X}u9  
5             -900.522             0.2 )S5Q5"j&=f  
6            40.95                   4.69             1.72916          54.7 `fL$t0"  
7              -20                     1.23              1.80518          25.4 Y/4B*>kl  
8              -287.692           ***2   <?I~ +