CANON镜头卡口上有一串字母加阿拉伯数字， 如UA0902， FG1103等。 E NGg
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这组字母和数字代表了CANON镜头的生产地点和出厂日期，诸位可根据下面的解释判定一下你的CANON镜头的岁数 第一个字母不外乎下面3个字母，代表生产地： E NGg
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U = Utsunomiya, Japan E NGg
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F = Fukushima, Japan E NGg
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O = Oita, Japan E NGg
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E NGg
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第二个字母代表生产年 E NGg
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A = 1986, 1961 E NGg
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B = 1987, 1962 E NGg
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C = 1988, 1963 E NGg
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D = 1989, 1964 E NGg
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E = 1990, 1965 E NGg
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F = 1991, 1966 E NGg
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G = 1992, 1967 E NGg
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H = 1993, 1968 E NGg
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I = 1994, 1969 E NGg
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J = 1995, 1970 E NGg
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K = 1996, 1971 E NGg
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L = 1997, 1972 E NGg
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M = 1998, 1973 E NGg
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N = 1999, 1974 E NGg
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O = 2000, 1975 E NGg
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P = 2001, 1976 E NGg
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Q = 2002, 1977 E NGg
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R = 2003, 1978 E NGg
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S = 2004, 1979 E NGg
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T = 2005, 1980 E NGg
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U = 2006, 1981 E NGg
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V = 2007, 1982 E NGg
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W = 2008, 1983 E NGg
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X = 2009, 1984 E NGg
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Y = 2010, 1985 E NGg
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Z = 2011, 1986 E NGg
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后面2个阿拉伯数字代表生产月：如01代表1月， 09代表9月，11当然代表11月了。 E NGg
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E NGg
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后续的2个阿拉伯数字没多大意义，CANON内部标识！
