Main Feature:

• Brand New Double Helical Focuser
• 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
• Accuracy: 0.05mm
• Interface: 1.25 inch w/ M42*0.75 male thread
• Primary Mirror Interfaces: M31X0.5
• Focusing stroke: 10mm
• Minimum length: 43mm
• Longest length: 53mm
• Net Weight: 93g / 3.3oz