A C-mount adapter is available to easily mount an Avantes fibre-optic spectrometer to a microscope. It connects to an SMA or FC/PC fibre-optic cable and features an outside diameter of 38mm: 35mm long to slide inside the tube of a microscope.
A special adapter with C-mount 1 inch-32 thread is available as AVS-MFA-SMA to screw onto a microscope.