Series 4000 Plössl 9mm...
Meade Series 4000 Plössl 9mm Illuminated Reticle Eyepiece (1.25"), wireless #07068. This special purpose eyepiece for guiding during long exposure astrophotography features high quality 4-Element, fully-coated Plössl optics and a fully illuminated double-crosshair, with two concentric targeting circles. For use with a Meade Off-Axis Guider.