Rick Yandrick is an astrophotographer putting together a 10" f5 Newtonian Astrograph. He purchased a 12" carbon fiber sandwiched cored OTA tube and a custom carbon fiber mirror cell. 

   

Yoke style, carbon fiber mirror cell can be seen just in front of the custom CNC (red) aluminum back ring, designed by Rick.

The 10" f5, center post conical primary mirror by RF Royce can be seen just in front of the mirror cell.
 
 
 
   
   
 

   
 
   

Rick has recently (July 16, 2005) attached RoboFocus to his 10" and will soon be capturing test images.
 

"...after working with a Newtonian with a Carbon Fiber tube, I would never want to use anything else. The lightweight, thermally stable aspects are too great to ever go back."

Rick Yandrick - July 16th, 2005