Coaxial Lens Holder, Optical Self-centering Mount, Adjustable Range: 5-50mm/5-80mm/5-120mm, Spring-driven 3-claw Clamp, For Experiments 80mm

【3 Adjustable Ranges】: Select from 5-50mm, 5-80mm, or 5-120mm clamping ranges to fit round lenses of different diameters, and use the locking knob to secure the chosen opening for reduced movement during optical alignment and adjustment tasks. 【Synchronized 3-Claw Clamp】: Three groove-shaped jaws move together through a spring-driven mechanism, distributing clamping force evenly around the lens edge for stable positioning, less slipping, and reliable holding during lens installation, testing, and lab work. 【Quick Self-Centering Setup】: Reinforced return springs drive all three jaws simultaneously, helping position round lenses near the holder axis and reducing repeated manual alignment during optical experiments, benchtop setups, and precision adjustment work. 【Aluminum Alloy Construction】: The anti-rust aluminum alloy body and reinforced spring components support repeated laboratory use while maintaining stable operation during lens installation, adjustment, and long-term optical fixture applications. 【M4 Mounting Interface】: An M4 threaded hole on the outer base allows downward attachment to a compatible support post or optical base, helping create a stable coaxial arrangement for alignment, testing, and laboratory optical setups.