T-2 Expanding Ring, T2/M48 (# T2-29) converts 2"/M48 filter threads to internal T-threads. Has a male M48 thread on one side and a T2 female thread all the way through on the inside. This very handy accessory converts M48 female into T-2 female thread, it has a male M48 thread (which is also the same thread as Baaders 2" filters) and has a female T-2 thread, this means that it can be screwed onto a T-2 accessory and then offer an M48 thread instead.
OPTICAL TUBE LENGTH 2,5
T-2 PART # 29
INNER DIAMETER / CLEAR APERTURE 41mm
OUTER DIAMETER 50.5mm
INNER CONNECTION (LENS SIDED) Thread, T-2 (M42 x 0,75)
OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48