Telescoping Tube SM05-18Z

JCOPTIX telescoping lens tubes have SM1 or SM05 internal threads. Optics are secured in the internal sliding mount using supplied SM1RR/SM05RR retaining rings. Unlike conventional adjustable tubes, these tubes keep internal optics from rotating during translation. Continuous adjustment over a large range precisely controls working distances between optics. A side setscrew locks the position after adjustment. SM1 high-precision telescoping tube: the internal mount does not rotate or wobble during telescoping. Its compact, reliable structure readily integrates into 30 mm coaxial systems. Travel is 4.5 mm, with 0.5 mm displacement per turn. Note: before installing or removing the tube, use a wrench to tighten the side locking screw. After installation or removal, loosen it for normal adjustment and use. Long-travel telescoping tubes: the JCOPTIX SM05 tube has central SM05 internal threads for Ø12.7 mm optics up to 10.8 mm thick. One end has SM1 external and RMS internal threads; the other has SM1 and SM05 internal threads for extending SM05 lens tubes or other optomechanics. It provides 18 mm linear travel adjusted by an external ring, with 10 mm/turn adjustment and 0.1 mm resolution, and includes a locking function and an SM05RR externally threaded retaining ring. The JCOPTIX SM1 tube accepts Ø25.4 mm optics up to 12.5 mm thick. One end has SM1 external threads; the other has SM1 internal threads and a smooth Ø35 mm surface for extending SM1 lens tubes or other optomechanics. It provides 50.8 mm linear travel, ring adjustment at 10 mm/turn, and 0.1 mm resolution. It includes a lock and an SM1RR externally threaded retaining ring for securing optics.

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