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Every discipline that benefits from geochronology should participate in the stewardship and development of this field, including scientific efforts and financial support.
Locations for piercings other than the earlobe include the rook, tragus, and across the helix (see image at right).
Canon has been transitioning to a 10-digit lens serial number (starting in 2008 with the Canon EF-S 18-200mm f/3.5-5.6 IS Lens) and ending the inclusion of a separate manufacturing date code.
While date codes and the shorter serial number are still found on some lenses, this inclusion will likely end completely.
We loved the date code because it made aging a lens easy.
However, now we can age a lens based on the serial number alone.