第一个字母是表示出产地：
U = Utsunomiya 日本宇宫都
F = Fukushima 日本福岛 （92年后已经停产）
O = Oita 日本大分
T = Taiwan 中国台湾
86年后的镜头基本都是宇宫都生产的。
第二位的字母是表示生产时间，也就是我们所说的年份了。每向后一个字母，时间也顺延一年。如：
A = 1986, 1960；B = 1987, 1961；C = 1988, 1962；D = 1989, 1963；E = 1990, 1964...等等。现在我们比较常见的L头，基本上是UK往后的。譬如UT是05年，UU是06年，而UV是07年等。
后面的四位数字，头两位是生产月份，17-40编号为UT 1207，就是05年12月出产于宇宫都。后面的07是工厂生产批号，代表那个月的第七批。
CANON镜头编号年份详细解答
Beside the rear lens element of many (but not all) Canon lenses is a date code (as seen above) in the form. of "UR0902". This code is also present on many other Canon products including camera bodies.
The first letter, "U", indicates that the lens was made in Canon's Utsunomiya, Japan factory. Prior to 1986, this letter is moved to the last position of the date code.
U = Utsunomiya, Japan
F = Fukushima, Japan
O = Oita, Japan
The second letter, "R", is a year code that indicates the year of manufacture. Canon increments this letter each year starting with A in 1986 and prior to that, A in 1960 without the leading factory code. Here is a table to make things simple:
A = 1986, 1960
B = 1987, 1961
C = 1988, 1962
D = 1989, 1963
E = 1990, 1964
F = 1991, 1965
G = 1992, 1966
H = 1993, 1967
I = 1994, 1968
J = 1995, 1969
K = 1996, 1970
L = 1997, 1971
M = 1998, 1972
N = 1999, 1973
O = 2000, 1974
P = 2001, 1975
Q = 2002, 1976
R = 2003, 1977
S = 2004, 1978
T = 2005, 1979
U = 2006, 1980
V = 2007, 1981
W = 2008, 1982
X = 2009, 1983
Y = 2010, 1984
Z = 2011, 1985
* assumption of continuation being made for future years.
The first two numbers, "09", is the month number the lens was manufactured in. Month 02 is February, month 11 = November. The leading zero of the month code is sometimes omitted.
The next two numbers, "02", are meaningless in determining how old a Canon lens is. This is a Canon internal code (that is occasionally omitted).
You now know the manufacture date for your lens - But - You cannot know how long the lens was in inventory, in shipping transit and on a shelf until it was originally purchased (without having the original receipt or a reputable person accurately informing you).
The Canon lens date code in the sample picture indicates that this Canon EF 24-70mm f/2.8 L Lens (I know because I took the picture - not from the date code) was made in Utsunomiya, Japan in September 2003. |
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