This adapter consists of a male M54 x 0.75 thread on one end and a female M42 x 0.75 thread on the other. Optical thickness of the adapter is effectively zero.
This is very useful for connecting accessories such as filter drawers or filter wheels with a female M54 x 0.75 thread to accessories with male M42 x 0.75 (T2) threads.
|Connection side A
||Male M54 x 0.75|
|Connection side B||Female M42 x 0.75 (T2)