Alpine Astronomical M43 7.5mm Extension Ring for Hyperion and Morpheus Eyepieces

Designed for their Hyperion and Morpheus eyepieces, the Alpine Astronomical M43 Extension Ring fits between the eyepiece and eyecup to add 7.5mm of distance to achieve optimum viewing distance, or to keep smartphone digiscoping adapters firmly clamped over the eyepiece. Multiple rings can be stacked to get the correct distance to your camera's imaging sensor during eyepiece projection astrophotography. The ring works with either fold-down or winged eyecups and will fit any other eyepiece that has M43 male threads on the eyecup end.