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| Code | 667389 | Type | Zoom Sleeve | |
| Material | 6061-T6 aluminum alloy | Applicable optical component diameter | Ø25.4mm | |
| Maximum optical component thickness | 8.2mm | Travel distance | 51mm | |
| Adjustment resolution | 0.2mm | Adjustment efficiency | 4.8mm/turn | |
| Thread | SM1 internal and external threads |
Applicable optical component diameter: 25.4 mm
Maximum optical component thickness: 8.2 mm
Travel distance: 51 mm
Adjustment efficiency: 4.8 mm/turn, resolution: 0.2 mm
With SM1 internal and external threads
The LBTEK SM1 Zoom Sleeve features an SM1 internal thread at the center, allowing for the installation of optical components with a diameter of 25.4 mm and a maximum thickness of 8.2 mm. One end of the sleeve has an SM1 external thread, enabling it to be mounted onto lens tubes or other mechanical components. The sleeve provides 51 mm of linear travel, adjustable via a red knob with an adjustment efficiency of 4.8 mm/turn and a resolution of 0.2 mm. It includes a locking function with a locking screw located near the 0 marking. The sleeve comes with an SM1R retaining ring to secure the optical component and an SM1LR retaining ring to fix the sleeve itself.
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