The Meade ND 96 moon filter (0.9 density; 13% transmission) reduces glare and irradiation when observing the Moon with any telescope 4 inches and larger. It also helps separate members of a binary star system. With the Meade ND96, you'll be able to observe and photograph lunar surface detail that is often virtually invisible without filtration. You'll see small craterlets in the floor of the Moon's Clavius and resolve whorls, festoons, and loops in Jupiter’s north equatorial belt. The Meade ND96 moon filter's a must-have for lunar observer's. Its results can be nothing short of dramatic. Meade 4000-series filters are essential tools for the lunar and planetary observer. They eliminate irradiation that blurs object boundaries and improve contrast between colors. And they permit observation and photography of detail often virtually invisible without filtration.