Orion 7841 Gray 8x40 Achromatic Finder Scope Finder scope with 8x power magnification and a nice 40mm aperture lens for bright, easy aiming performance Crosshair finder scope features fully coated achromatic optics with 17mm eye relief Baffled tube held in aluminum dovetail bracket that has a simple spring-loaded, 2-screw adjustment Offers a 5.3 degree (inverted) field of view and adjustable focus Weighs 11.2 oz