A secure way of attaching a CCD camera at the image plane of the telescope. The SecureFit Spacers attached via four screws to the PlaneWave Hedrick focuser. And with a PlaneWave SecureFit CCD Adapter, the CCD camera is also attached via screws so there will be no slipping, movement or falling equipment. For the CDK17 and CDK20 there are two lengths, 3.8" and 2.1". The backfocus of the CDK17 and 20, from the fully racked in focuser, is 5.81" and the Hedrick focuser has 1.3" of travel.
SecureFit Spacer Installation Instructions