Astro-Physics 2" Visual Back for Standard Rear Cells
Astro-Physics 2" Standard Visual Back
This visual back fits rear cells that have a 2" opening with a 24 TPI (threads per inch) male thread and is 2.06" long. It can be used with the 8", 9.25" (except the 9.25" Celestron EdgeHD) or other SCT with the standard SCT rear cell. It can also be used with the Maksutov-Cassegrain scopes from Telescope Engineering Company (TEC) that have this specification.
This AP visual back allows you to use 2" accessories that slip in, i.e. 2" diagonals, Barlows, 2" eyepieces or CCD camera. The ADASCT also fits DayStar T-Scanner cover that has male T-thread.