Meade Illuminated Reticle Eyepiece Systems Wireless and corded models. These special-purpose eyepieces include reticles with etched crossline patterns, internally red-illuminated so that the lines are clearly visible against a dark sky. All eyepieces are 1.25" O.D. Series 4000 Plossl 9mm Illuminated Reticle Eyepiece: The most advanced commercially-available illuminated reticle eyepiece, this Series 4000 Plossl 9mm model includes micrometric x-y positioning controls which greatly facilitate locking onto the guide star: turn the finely-threaded controls and place the reticle's crossline pattern precisely at the desired position in the field.
The sharp, high-power imaging of the 4-element, multi-coated Plossl optical system is complemented by a rubber eyecup (foldable for eyeglass wearers) that shuts out distracting stray light from the observer's eye. The upper (lens) section of the eyepiece rotates on a fine thread for precise diopter adjustment to the user's eye. Reticle pattern is a double crossline with two concentric circles. The Wireless Illuminated Reticle Eyepiece includes a red LED illuminator, operated from internal batteries, with variable brightness control; batteries are included with each eyepiece.