Description
OPTEK TECHNOLOGY OPB806 Transmissive Photo Interrupter, Phototransistor, Through Hole, 3.175 mm, 1.52 mm, 20 mA, 2 V LensCoat LW316M4 Talkback Microphone: 45 dB Speaker Talkback Microphone: 45 dB Speaker 4 Brass fittings Anti reflective threads increase contrast Perfectly matched threads to accept NebuStar & OIII filters