Alpy SBIG ST camera adapter

Special mechanical adapter to mount an Alpy spectroscope on a ST7, ST8, ST10 or ST2000 camera. This adapter replaces the one from SBIG and allows to reach focus.
As the Alpy objective lens goes very close to the window of the CCD camera, one has to be very careful when using this adapter and focusing the spectrum not to touch the two optics together to avoid scratching/crushing them.