Alstar Guide Scope 50mm Telescope Finder Scope, Equipped with FMC Lense and 1.25 Inch Double Helical Focuser Compact Finders & Guidescope Kit for Astronomical Telescopes & Astrophotography Observation — Open-Box, 19% Off

Precision Helical Focuser System: Features a built-in helical focuser with brass compression ring and dual thumbscrews for ultra-fine adjustments; Provides 40mm total focus range including 10mm micro-focusing capability; complemented by a scalable drawtube for extremely precise focus control; Ensures zero flexure during astrophotography sessions with secure locking mechanism

Universal Compatibility & Easy Installation: Includes Synta-style dovetail mounting plate and pipe clamps for quick attachment to virtually any telescope; The adjustable dovetail weight balances your astrophotography setup perfectly; Compact design allows convenient storage in accessory cases between uses; making it ideal for mobile observing sessions

High-Performance Optical System: Boasts 200mm focal length with fully multi-coated lenses for bright; wide-field views; Specifically designed for telescopes up to 1500mm focal length; putting numerous guide stars within view; The 50mm aperture captures ample light for reliable guiding and easy object location during visual observations

Durable Construction & Professional Features: Constructed with sturdy black anodized aluminum housing for maximum durability; Features milled knurled rings for precise fine-focus adjustments and prevents camera/eyepiece rotation; The robust metal build ensures long-term reliability under various observing conditions while maintaining lightweight portability

Multi-Purpose Guide Scope Application: Serves as both finder scope and guide scope for astronomical telescopes; Enables quick object locating and guide star acquisition with comfortable large viewfinder; Perfect for astrophotography guiding and visual observation; significantly reducing time spent searching for celestial objects during extended imaging sessions

This small Guidingscope handles all the tasks of a "classic" Leitfernrohrs - but it is lighter and much easier to use! Previously used to long and large Leitfernrohre to find a guiding star. Eliminate the need to! The sensitivity of modern astro imagers is on your side. The Mini-Guidesope set as a viewfinder on your telescope.The 50mm Guide Scope is a complete and compact guide scope solution designed for use with nearly each autoguider and CCD camera in the market. The Guide Scope is ideal for guiding long-exposure astrophotographs with imaging telescopes up to 1500mm in focal length. Consisting of a 50mm aperture, 190mm focal length achromatic refractor guide scope, an adjustable dovetail guide scope bracket, an 1.25" aluminum parfocal ring, a dovetail mounting base, and an adapter plate, the 50mm Guide Scope makes it easy for any astro-imager to enjoy the precision of autoguiding in their images. All this pint-sized setup requires is a StarShoot AutoGuider or similar small-chip CCD autoguider and it’s ready for night, camera, action! The guide scope bracket fits into the standard dovetail finder scope base found on most telescopes. If your imaging scope doesn’t feature a dovetail base or has one already occupied by an oft-used finder, the dovetail base（not include）and attachment hardware lets you attach the 50mm Guide Scope to any optical tube. Alternatively, the included adapter plate can be used to attach the dovetail base and 50mm Guide Scope to any standard dovetail plate or side-by-side plate if preferred.