Meade Series 4000 MA 12mm Illuminated Reticle Astrometric Eyepiece (1.25"), Wireless #07069. This special purpose eyepiece for guiding during long exposure astrophotography as well as taking measurements features illuminated crosshairs, so that the lines are clearly visible against a dark sky. May be used with a Meade Off-Axis Guider or directly in a diagonal or eyepiece holder.
This high precision eyepiece has four different illuminated scales for making astronomical measurements of angles and distances. Night vision preserving red LED illumination and rubber eyeguard for comfort and blocking distracting stray light. Fully coated optics. Features a variable brightness dial and on/off switch and is powered by small internal watch type batteries.