Specification Brand : GOWE BulletPoint1 : Multipurpose MINI telescope; Sets finder / guider / viewing three in one; All aluminum CNC machining production; Precision double helical focusern with large stroke; Multilayer broadband; Antireflection coating; Doublet lens; diffferent CCD camera are in focus directly 1.25 inch barrel can be replaced after the zenith mirror; Multi-standard connection hole for easy connection accessories BulletPoint2 : The inside of the adapter is fully threaded to minimize reflections. Effective diameter D = 50mm; Effective focal length f = 270mm; Interface 1 = 1.25 inch eyepiece mouth; Interface 2 = M42 * 0.75 thread; Screw: 1/4, M6, M4; Weight = 430g; Package: one pc telescope guider; one pc 1.25 Inch Double Helix Focuser ExternallyAssignedProductIdentifier1 : 0827674589736 ExternallyAssignedProductIdentifier2 : 827674589736 Finderscope : Reflex FocusType : Manual Focus ItemName : GOWE New Telescope Finder Guider With 1.25 Inch Double Helix Focuser ItemPackageQuantity : 1 ItemTypeKeyword : telescope-finderscopes Manufacturer : Gowegroup PartNumber : GWE-1015487 ProductDescription : GOWE New Telescope Finder Guider With 1.25 Inch Double Helix Focuser ProductSiteLaunchDate : 2015-08-22T08:19:33.218Z UnspscCode : 41111715 Voltage : 230 volts