PB C8/M8 - "Complete camera piggyback mount. Fits Celestron 8 or Meade 8 Schmidt Cassegrain tube assembles. Dovetail mounted. Slides from front to back of tube assembly for use with wide angle lens. No tools needed." Never used, though I did attach a camera to the mount briefly. New these sell for $70. Will sell for $55 Plus Shipping, Paypal +3% Okay.