Date Code

[staceyann]

I am showing my stupidity but I see date code mentioned here on the forum regarding lenses.

Please explain what it is and I see UU or UT before the number. What does UU/ UT stand for?

[steven park]

http://www.the-digital-picture.com/Canon-Lenses/Canon-Lens-Aging.aspx

This will help.

[staceyann]

http://www.the-digital-picture.com/Canon-Lenses/Canon-Lens-Aging.aspx

This will help.

Thank you for the reply and link!

[Crossfire]

It's essentially a birth certificate for Canon's L series lenses