Quantum Scientific Imaging QSI Astronomik 500 Series WSG 5mm Spacer

The standard 500 Series WSG cover is designed to be used with guide cameras having back focus of 12.5mm or less. This 5mm spacer, which goes between the camera body and WSG, cover extends the range of suitable guide cameras to include any guide camera with the standard C-mount back focus of 17.5mm. Includes a longer set of screws for use with WSG cover.