MODELS 80/100: Especially designed for wide field astrophotography
Model 80 features a highly corrected three element Taylor-type astrographic objective lens. It features a wide field 80mm aperture objective of 400mm focal length (f/5). Focusing was accomplished by rotating a collar that moves the objective. Three double film holders for 4″ x 5″ film are included. Photos courtesy of Xavier Debeerst
The following photos provide a comparison between the Model 80 and the Model 100 Astrographs. These photos were provided courtesy of a Private Source. The Model 100 differs from the Model 80 in that it has a Four-element, Tessar-type, coated astrographic objective; 100mm aperture, 500mm focal length, f/5
A 60 mm Astrograph was recently identified and photos provided by Dimitrous Barounis. This model Astrograph was never included in any Unitron/Polarex catalog but was included in a catalog on the Mizar Observatory website.