Meade 4000 Series 12mm Astrometric eyepiece
In order to perform measurements at the eyepiece of the telescope one must have a graticule and a protractor projected into the eyepiece. The Meade eyepiece does this well. Its a solid eyepiece 12mm design, the etching on the lens is crisp clear with an excellent quality adjustable illumination LED. It has a focuser to allow a variable adjustment of the image for comfortable viewing, priced reasonably as well.