Alpine Astronomical Baader 2" SCT Female to M48i Female Zero-Length Reducing Adapter

The Alpine Astronomical Baader 2" SCT Female to M48i Female Zero-Length Reducing Adapter was originally designed to allow the use of their Hyperion Universal Zoom Mark IV eyepiece with any photographic M48x0.75 threads. Since it is just a simple reducer ring that fits standard 2" Schmidt-Cassegrain Telescope (SCT) threads, it can be used for a variety of applications beyond its initial intended purpose as either a general-purpose reducer or expander based on your needs, for example, as an expansion ring that converts a photographic M48-thread into a male 2" SCT thread.