6″ Photo-Equatorial Refractor, FL 2500mm, ten eyepieces, Super rack and pinion, 12.5X 60mm viewfinder, Sun projecting screen, sun glass filters, Hershel wedge, star diagonal, Super Unihex, dewcap and dustcap with solar aperture diaphragm, 100mm photographic guide scope, Model 80 Astrograph.
The 6″ Unitron featured first was assembled in the late 1960’s and was displayed in the Unitron showroom in Boston until 1978. The University of North Texas was looking for a large telescope to put in their observatory. When they contacted Unitron, they made a great offer on what is rumored to be the last large refractor manufactured for Unitron by Nihon Seiko. This telescope is covered in greater detail in a featured story during Jim Curry’s October 2014 visit to the Rafes Urban Astronomy Center. A second Unitron Model 620 with a weight driven clock drive is located on the campus of Castleton University, Castleton, Vermont. It is also covered in greater detail in a feature story under the Discoveries Page.