本人觉得,由于畸变的存在,使得不同视场具有不同的焦距,其必然引起不同的F数 *$(=I6b
X and Y F-numbers for each field angle oeXNb4; 4
X 1.992151 2.046117 2.172037 2.364546 6'C!Au
Y 1.992151 2.338546 3.121385 4.866429 SwQ.tK1p
0 .999 .999 .999 T0_9:I`&
10 .986 .986 .984
w'=#7$N
20 .971 .971 .963 :,F^{
30 .957 .957 .939 h3;Ij '
40 .942 .943 .913 <$.KCLP
50 .928 .929 .883 |Sg *j-.
60 .914 .914 .853 $8&HpX#h$
70 .899 .900 .821 &Q