Solomark 1.25" High Precision Double Helical Focuser with 0.1mm Scale for Telescope Lenses/Finder & Guidescope

High Precision double helical focuser for guider scope / finder scope Interface.

The solution for telescopes or telephoto lenses with sluggish focusing.

Item was made by Full metal, durable.

Interface: 1.25 inch w/ M42*0.75 male thread, primary Mirror Interfaces: M36X1.

Accuracy 0.1mm; Focusing stroke: 10mm; Minimum length: 43mm; Longest length: 53mm.