Cassegrain Focus
Images showing the mirror cell of a Cassegrain focus instrument.
Telescope World – 12.5 inch Newtonian
This is a 1979 to 1986 Vintage 12.5 inch F 4.5 reflector built by Telescope World. The main optical tube is made from Duralite – a composite material with excellent thermal and structural properties and painted with Dupont Imron paint. This combination gives impressive strength and durability to house the optics. The spider is made …