How they make Canon lenses

[evoWALO]

And why they are so expensive.

http://www.petapixel.com/2010/04/19/the-making-of-a-canon-500mm-f4l-lens/

 

[Cold Fussion]

I wonder if canon would show the QA depertment for a certain few lenses.

 

[LeVeL]

really cool