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