P3D Re: Big Dia. lense (was digest 3751)

[Greg Erker <erker@xxxxxxxxxxxxxx>]

>Hey, while I'm at it....  I really liked the big lenses that were part of a
>French Rotary Viewer I recently sold on ebay...  These were about 2" across
>and seemed to enlarge the print in the boxed viewer slightly as well.  Are
>lenses like this available anywhere? they looked like single lenses to me
>that were in a 1900 (approx year) viewer....  I'd like to re-make one of
>these... has anyone done this for 3x7 prints?

  Surplusshack/shed had some 50-some mm
diameter achromats. Maybe they would
work for you:
http://www.surplusshack.com/lpm.html

Greg E.