ALT231

T2-31

Alpine Astronomical

Use the Alpine Astronomical Baader Double-T Filter Holder for mounting standard 1.25" astronomical eyepiece filters onto Baader bino-viewers to enjoy the comfort of binocular telescope viewing without having to purchase two of every filter or complete sets of larger-diameter filters. One side has double T-mounts external male T-mount threads, and internal M28.5 threads and the other end is outfitted with standard female 1.25" filter threads.