Canon lens ? If so the 6 digit that starts with letters is a date of manufacture code and tends to be on L glass only and the rear plate of the lens. The one that's just numbers is most like the serial, and tends to be on the barrel.
Canon lens ? If so the 6 digit that starts with letters is a date of manufacture code and tends to be on L glass only and the rear plate of the lens. The one that's just numbers is most like the serial, and tends to be on the barrel.
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