18 inch Ritchey-Chretien at Unv. Florida - Al-Paslow
This view provides a look at the tube assembly. The 18 inch Hyperbolic mirror is covered with a two handled cap. The long black primary baffle tube keeps sky light from "flooding out" the image, and is essential to all Cassegrain systems, of which the Ritchey-Cretien design is included .

 The 4 vane secondary system is extremely ridged with virtually no flexure. Flexure in a Ritchey-Chretien system is totally unacceptable, as the alignment must be of absolute precision or this will render the optics useless.

 The weight of the heavy hyperbolic secondary system has also been carefully counter-balanced by the "counter weight" protruding at the end of the spider. Wagman Observatory -Manka Telescope take note of this !!

This view provides a look at the tube assembly. The 18 inch Hyperbolic mirror is covered with a two handled cap. The long black primary baffle tube keeps sky light from "flooding out" the image, and is essential to all Cassegrain systems, of which the Ritchey-Cretien design is included .

The 4 vane secondary system is extremely ridged with virtually no flexure. Flexure in a Ritchey-Chretien system is totally unacceptable, as the alignment must be of absolute precision or this will render the optics useless.

The weight of the heavy hyperbolic secondary system has also been carefully counter-balanced by the "counter weight" protruding at the end of the spider. Wagman Observatory -Manka Telescope take note of this !!

18inchTelescope