The Vixen #37292 T-Thread to 2" Eyepiece Adapter has a 42mm female T-threading upon one end, and a 2" inner diameter sleeve on the other end.
It is used to allow the Vixen #2680 flip mirror to accept 2" astronomical eyepieces-normally the #2680 flip mirror has a pair of 1.25" eyepiece barrels (which can be unscrewed to reveal a 42mm male T-threading). Simply unscrew one of the flip mirror's 1.25" eyepiece barrels and exchange this in its place.
- Two set screws secure 2" astronomical eyepieces
- Adds 38mm of optical path length