Alpine Astronomical Baader UFC 31mm Aux Mounted Filter Holder

Part of the Universal Filter Changer (UFC) system, the Alpine Astronomical Baader UFC 31mm Aux Mounted Filter Holder is designed to allow the use of smaller 31mm round and unmounted filters in the UFC filter base—enabling quick and easy filter changes during multiple exposure astrophotography sessions without having to disassemble your imaging rig. The way this holder works is that your filter mounts into the holder, which in turn mounts into the UFC D50 slider for round and unmounted 50.4mm filters, which then gets inserted into the UFC filter base. All of the required mounting hardware is included. This is the filter holder only; the UFC D50 slider, filter base, and filters are all required for use.