I see I see. Thanks for explaining
Btw, is there any website i can check the age or the location of the lens manufacturing country from using the serial number of the lens?
The country of manufacture would be printed on the lens itself.
The serial number does not show any info about the lens.
Only Canon L lens have a lens code which show the factory and date of manufacture.
Read more on the lens code on L lenses at http://www.the-digital-picture.com/canon-lenses/canon-lens-aging.aspx