Telescope accessories Capacity Connection (to the telescope)
Specifies the product's connection or connection thread on the telescope connection end. The same adapter dimension must always be available on the telescope.
More information:
C mount
A thread common to video cameras. To connect to a telescope a C mount to 1.25" adapter is required.
SC thread
A 2" thread, which can be found on Schmidt Cassegrain telescopes and various accessories.