Interesting to see Markus Ludes advertize the lastest astro goodie...6" f/17 Zeiss Planetary apo Refractor...doublet Type A apo. I had read the design a long time ago but have forgotten. What is a Type A apo?
Pat Kelly in Centreville (Delmarva), Maryland. Retired but working second career.
Telescope - 8" f/12 classic achromat refractor by D&G Optical; Manheim, Pennsylvania;
Mount - 1200DA metric black classic equatorial mount circa 1992 by Astro-Physics; Machesney Park, IL;
BlueStar Observatory 13 x 13 roll off by Backyard Observatories; Lodi, Ohio;
Previous telescopes A-Z: Astro-Physics to Zeiss...D&G Optical Aficionado; The Classic Refractor - The telescope everyone wants to have used but no one wants to own.
