Aklin, G.(1945). telephoto objective, U.S. Patent 2380207. UE}8Rkt
Arai, Y. (1984). Large aperture telephoto lens, U.S. Patent f}Ne8]U/Hc
Cooke, G. H.(1965). Photographic objectives, in Applied yv6Zo0s<J
Engineering, Vol. 3, R. Kingslake(Ed.), Academic, New F[o+p|nF
Eggert, J.(1968). Photographic telephoto lenses of hing telephoto s0~05{
2288956. _mIa8K;
Horikawa, Y. (1984). Telephoto lens system, U.S. Patent 9 AQ96
Kreitzer, M. H.(1982). Internal focusing telephoto lens, sw 3:HNG=
Matsui, S.(1982). telephoto lens system, U.S. Patent 4338001. ^g}gT-l%
Tanaka, T.(1986). Lens system, U.S. Patent 4575198.