Thanks, Dan and Nadia.
The coins are produced by our mint, but distributed (for the time being) by that great Canadian institution, Tim Hortons. :-)
In 50 years theymight be worth $5 CDN, which would probably add up to, say, 25 cents US. :?
Thanks again, I really like my new lenses, but I still have to figure how to coax more DOF out of them.
Tom, on Point Pelee, Canada