Meade 07171-02 9.7mm Super Plossl Series 4000 Excellent general-purpose eyepiece for observing hairline lunar and planetary detail or resolving faint nebulosity in deep-space Extremely low astigmatism, spherical aberration, and off-axis color Incorporates 7-layer multi-coatings and edge-blackened optics Includes a soft rubber eyeguard, custom-fitted with a bayonet mount Eyeguard folds down for eyeglass wearers