On June 13,1672, Christiaan Huygens wrote about the Cassegrain design and critiqued it harshly, maybe because Huygens felt Newton's design was being "imperiled" by this alternative.
On June 13,1672, Huygens wrote about the Cassegrain design and critiqued it harshly. The reaction seems extreme to us moderns--maybe Huygens felt Newton's design was being "imperiled" by this alternative.