SM1 Lens Tube SM1-75D

The LBTEK internal and external threaded lens sleeve features SM1 external threads on one end and SM1 internal threads on the other, primarily designed for securing optical components with a diameter of Ø25.4 mm. It adopts an expandable design, making it suitable for quickly assembling compact optical systems. Each lens sleeve comes with an SM1R retaining ring for securing optical components. The SM1-8V includes 12.5 mm external threads and an external retaining ring, allowing adjustable connection depth for the lens sleeve. The SM1-50D features external slots, enabling lens position adjustment without removing the retaining ring. After adjustment, rotating the outer sleeve can cover the slots.