[Kal (Andrew)]

Originally Posted by Wavytone

Brief summary of the Honders-Riccardi in Newtonian format. http://www.telescope-optics.net/hond...htm#minimizing

A cassegrain version would also be spectacularly well corrected, but I'd prefer a newtonian version around f/6-f/7.

Cheers, I hadn't come across that page in my research, some good info there