Threaded adapter made in aluminium. Features M52 and T2 threads. Length 17 mm. This adapter threads directly onto FS-60 field flattener and focal reduce, or any M52 CA35 for FS-60. Metal back distance for this adapter becomes 44 mm from T2 thread.
Takahashi CA35 TKA35201 for Sky-90 and other instruments. Directly compatible with T-Wide Takahashi rings (M54 thread). This ring is compatible with various instruments other than Sky-90, for instance it can be used with the 0.73x focal reducer QE for FSQ-106ED.