Tele Vue Adapter to use 48mm filters with TeleVue IS refractors

This TeleVue adapter lets you use 48mm filters in the optical train when imaging with TeleVue IS refractors . . . This TeleVue filter adapter lets you insert 48mm light pollution filters, CCD imaging filters, and color filters into the threaded imaging accessory optical train of TeleVue IS-series refractors during prime focus imaging. The adapter adds 0.25" of spacing and replaces the #13T025 spacer ring if one is used in your particular imaging configuration. The adapter has dual threads to connect to the imaging system accessories, with a central 48mm threaded insert that holds the filters.

The adapter is made of black anodized aluminum.