Orion 7840 Black 8x40 Achromatic Finder Scope A step up in performance from standard 6x30 finder scopes Baffled tube held in aluminum dovetail bracket that has a simple spring-loaded, 2-screw adjustment for easy alignment with the telescope Offers a 5.3 degrees (inverted) field of view and adjustable focus Features fully coated achromatic finder scope optics with 17mm eye relief