Patent ID: 6671106
Filing Date: 2003-12-30
Classification: G02B

Abstract:
A telescopic lens system comprising a positive first lens group, and a positive second lens group, in this order from an object;wherein said first lens group comprises cemented lens elements comprising a positive lens element and a negative lens element; wherein said second lens group comprises a positive lens element and a negative lens element; and wherein said telescopic lens system satisfies the following condition: 0.611|/&Sgr;|S1|wherein &Sgr;|S1I| designates the total sum of the absolute values of the spherical aberration coefficients (Seidel coefficients) of said positive first lens group; and &Sgr;|S1| designates the total sum of the absolute values of the spherical aberration coefficients (Seidel coefficients) of the entire telescopic lens system.