M68aM63i
M68 System Adapter from M68 to M63 - Riccardi connection adapterWith htis adapter, you can, for example, connect the Riccardi Reducer
with the male M63x1 thread at the telescope side to all focusers and
adapters with female M68x1 thread.
Only 1 mm optical path is needed because the male M63 thread is sunk into the connection adapter or into the Riccardi Reducer.