UNITRON - POLAREX These telescopes and most of their accessories were manufactured by Nihon Seiko Kenkyusho, Ltd. based in Tokyo, and it’s subcontracted vendors in Japan. The company was established at least as far back as the the mid 1930’s, then furnishing fine achromatic refracting telescopes, based on the Carl Zeiss type E air-spaced doublet achromat lens design, of at least up to 125mm aperture under the POLAREX or SEIKO SCOPE trade names. 

 

ZEISSTRON Refracting Telescope THE GEORGE H. LUTZ SCIENCE CENTER 

 

ZEISSTRON Refracting Telescope THE GEORGE H. LUTZ SCIENCE CENTER 

 

ZEISSTRON is a nickname we have given to our 4" F/15 UNITRON - POLAREX refracting telescope with a 3" F/15 UNITRON refracting telescope               as a photographic guide-scope. Unitron incorporated much of the early Carl Zeiss optical design in their telescope systems. 12/14