From: "pdk" 
To: "atm" 
Reply-To: "pdk" 


At the St Pete Astronomy Clubs star party, a fellow observed with an
unusual 2 mirror scope.  It had a normal  "cass/mak/gregorian"
style look, however the secondary was a second surface mirror, using the
glass in front of the shiny side as a lens. The gentleman whom owned it
told me the name but several nights with limited sleep seem to have killed
the brain cells that stored that data.  Does anyone know what this is
called?  What kind of surfaces must be used?  It was a quite fine scope.

Thanks in advance,

PK

--- BBBS/NT v4.00 MP