Help keep dew and dust off the front of your Meade ETX 90 Maksutov-Cassegrain telescope (MAK) corrector plate with the Farpoint Astro Flexible Dew Shield. Made from flexible ABS plastic with a hook-and-loop closure for fast and easy installation and removal, the shield's interior surface is lined with black felt to absorb unwanted light reflections and prevent moisture from condensing into and sliding toward the plate.