Here's the business-end of the amazing 6-inch Goto refractor owned by John Pons. Originally built in 1954, acquired by Joe Choate of Los Angeles, CA in 1956, it was destined for the landfill when John acquired it some years ago. It was a basket case until John's magic brought it back to its former glory. Today, it appears exactly as it looked in mid-1950s Sky & Telescope advertisements.
I'll let you in on a little secret. The objective lens presently installed in the Goto is actually a prototype 6-1/4 inch clear aperture Unitron lens. The Goto objective is carefully wrapped and stored elsewhere, but can be reinstalled at any time. Both objectives are superb examples of the opticians art.
-------------------- I don't get no respect, but my scopes do! ----------------------------------------------
1961 Swift 60mm model 839 (2); 2003 TV-102/GM-8; 1959 8" f/6 Treckerscope; 1959 8" f/7.4 Murray Scope; 1959 Fecker Celestar-4; 1978 4" Edmund Astroscan; c. 1986 4-inch Celestron-Vixen SP-C102; c. 1950 20X60 Saturn spotting scope; 1963 7X50 Nippon Kogaku binoculars; Unitron #114 alt-az mount (Swifty-tron)