![]() "Consumer" USM, Micro Motor, and STM AF consumer lenses NEVER have separate date codes. I suspect it may have to do with which factory the lens is made in. Some "L" lenses like the EF 24-105mm have continued with 7 digit serial numbers and separate date codes. Starting in 2008, new designs were introduced with a 10 digit serial number which should contain a date code. In the past most "L" lenses had 6, 7, or 8 digit serial numbers and separate date codes. Not all Canon lenses have date codes, or serial numbers that can be decoded.Ĭanon might have some master list somewhere but I bet if you were to ask Canon, they would say it’s not possible. Sorry, there is no way you can date your lens.
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