The Baader Planetarium HYP-ZOOM is an 8-24 mm Hyperion Clickstop Zoom Mark III eyepiece that includes both 1.25" and 2" barrels. The 2" barrel attaches through an included adapter ring that has standard 2" x 24 tpi SCT threads. The Hyperion Zoom Mark III eyelens barrel has been provided with an M54 thread (covered by the removable rubber eyecups).
A complete system of adapter rings enables cameras to be directly (and rigidly) close-coupled for afocal projection or variably extended for classical eyepiece projection imaging with the T-Adapter and Extension Tubes. A series of 16 threaded rings provides compatibility with just about every digital (CCD/DSLR) and video camera made.