2 Inch NX4 (C90) / ETX Expanding Ring
This item is part 'A' of item #B2958500 - NX4 universal photo adapter.
It has a female 1.375"x24TPI thread which fits onto your MAK telescope rear cell and a Std. SCT 2"x24TPI thread, part 'A' can be used by itself to thread SCT accessories to your scope, this part also has internal 1.25" filter threads to allow a filter to be fitted inside the adapter to utilise it with any other added parts.
Please note: The design Specification on some of the Scopes listed have changed over time, and you must ensure that the thread sizes mentioned are applicable to your scope prior to purchasing this accessory.