SVBONY SV161 Double Helical Focuser for Telescope Finder Guide Scope High Precision with Brass Compression Ring 1.25" (M42x0.75)

The double helical focuser was made with M31x0.5 male thread on one side and M42x0.75 male thread on the other side, full metal durability. The other side has a male T-thread flange (M42x0.75) and an accessory thumbscrew for attaching a StarShoot autoguider or 1.25" eyepiece. The focuser has a female T2 thread on the telescope side and allows for attachment of 1.25 inch instruments on the eyepiece/camera side. High precision double helical focuser for guider scope finder scope interface. A solution for loose focus telescopes and telephoto lenses. The focuser has a fixed orientation, so the attached camera or eyepiece will not rotate, and the guide star field of view will not rotate when focused Accuracy 0.05mm. Focusing stroke is 10mm, minimum length is 43mm, maximum length is 53mm. Interface: 1.25 inch with M42x0.75 male thread. Main features: Aerospace aluminum alloy material Precision CNC machining technology Brushed and anodized housing Non-slip brass screws. The focuser orientation is fixed, so the attached camera or eyepiece does not rotate, or the guide star's field of view rotates when focusing. Double helix focuser for guiderscope/finderscope interface. A solution for slow focus telescopes and telephoto lenses. Specifications: 1. Brand: SVBONY 2. Model: SV161 3. Inner diameter: 1.25" 4. Stroke: 10mm 5. Adjustment accuracy: 0.05mm 6. Top thread: M42x0.75 7. Bottom thread: M31*0.5 8. Minimum height: 44mm 9. Longest height: 54mm 10. Net weight: 79g / 2.79oz Package includes: 1*1.25" double helical focuser 3*M3 screws