Stryker objective lens for camera assembly, optics are fine, in fact it's really good for looking at things very closely.
Disclaimer:
"The sale of this item may be subject
to regulation by the U.S. Food and Drug Administration and state and
local regulatory agencies. If so, do not bid on this item unless you are
an authorized purchaser. If the item is subject to FDA regulation, I
will verify your status as an authorized purchaser of this item before
shipping of the item."