This anodized aluminum adapter threads directly into our Imaging Flip Mirror (sold separately) to allow the attachment of astroimaging cameras with 1.25 nosepieces. Once the adapter is installed on the Agena Imaging Flip Mirror via T-thread, simply insert your imaging cameras 1.25 nosepiece into the adapter and secure with the adapters thumbscrew. It is used, for example, for filter wheels, guiders or similar accessories. A side locking screw provides for secure hold.