The LBTEK high-precision SM1 scaling tube center bore features SM1 internal threads, allowing optical components to be mounted using the included SM1R retaining ring. It is typically used for installing optical components with a diameter of Ø25.4 mm and a maximum thickness of 11.7 mm. The movement range is 5 mm, with an adjustment precision of 0.25 mm per revolution. Equipped with SM1 external threads, it can be directly screwed into opto-mechanical components with SM1 internal threads, such as SM1 lens tubes.

The LBTEK SM1 scaling tube featutuberes an SM1 internal thread at the center for mounting optical components with a diameter of 25.4 mm and a maximum thickness of 8.2 mm. One end of the tube is equipped with an SM1 external thread, allowing it to be installed into lens tubes or other mechanical components. This tube provides a 51 mm linear travel range, adjustable via a red knob with a travel efficiency of 4.8 mm per revolution and a resolution of 0.2 mm. The tube includes a locking function, with the locking screw positioned near the 0-mark side. The tube comes with an SM1R retaining ring for securing optical components and an SM1LR retaining ring for fixing the tube itself.

The LBTEK SM05 zoom tube features an SM05 internal thread at the center for mounting optical components with a diameter of 12.7 mm and a maximum thickness of 6.9 mm. One end of the tube has external SM1 threads and internal RMS threads, while the other end is equipped with internal SM1 and SM05 threads, allowing for expansion with lens tubes or other opto-mechanical components. This post provides 18 mm of linear travel, adjustable via a red knob with a translation efficiency of 4.8 mm per revolution and a resolution of 0.2 mm. It includes a locking mechanism, with the locking screw positioned near the 0-mark side. The tube also comes with an SM05R retaining ring for securing optical components.