Mechanical adapter specially designed to mount an Alpy spectroscope on a SBIG Model ST (ST7, ST8, ST10, ST2000) CCD camera. This adapter replaces the one that is mounted on the camera and allows the focus to be reached.  The lens of the Alpy comes very close to the window of the CCD camera, so it is necessary to use this adapter carefully when focusing the spectrum to prevent the two optics from touching or scratching or even break.