M42 VARIABLE EXTENSION 20.5 - 30mm Nadirus 12" 99mm and a resolution of

99mm and a resolution of 9 MPx

The maximum input current is 10A (normally this power need is not necessary) so a 17Ah power tank or an equivalent battery is sufficient to last at least a whole night

150 kg for standard single telescope configuration

Optical thickness from M63 thread

If you have other brands' mechanical accessories

M42 VARIABLE EXTENSION 20.5 - 30mm Nadirus 12" 99mm and a resolution ofExtension tubes are intended for reaching the optimal distances between field flattener reducers and sensors. They are also needed for eyepiece projection. This variable M42 (T2) extension allows to fine tune the distance by fraction of millimetres. The threads (male and female) are the international used M42 threads (T2). The extension consists of three parts (from left to right): Base with long male M42 thread Short locking ring with knurled outer