Jan there might be a number of used Celestron made in Japan 1.25" prism diagonals on the used market. I have two of these that I had from older telescopes. I am using one on each of my refractors!! Bob
-------------------- Homemade 16"F6.5 dob
Celestron Ultima 9.25
Celestron/Vixen Flourite 102F8.8 w Moonlight focuser
Celestron C6RGT w DS moonlight focuser
Cave 10"F6 Super Chrome deluxe
C80ED F7.5
Skywatcher PRO ED 120 w W.O dual speed rotatable focuser