Orion 7210 Black 6x30 Achromatic Finder Scope Quality crosshair viewfinder makes targeting celestial objects in your telescope easy! Fully coated 30mm achromatic finder scope optics yield sharp, bright views for easy aiming 6x power magnification reveals objects of interest in the sky Aluminum dovetail bracket has easy X-Y oriented alignment screws incuded bracket features a dovetail shoe that fits mounting bases found on most orion telescopes; extra dovetail bases are available (sold separately) for attaching the finder scope to other telescopes