The # 21 orange-orange filter blocks blue and green wavelengths, enhancing the details of Toyone and Jupiter's cloud belts. On Mars, it sharpens the boundary between orange and green areas. # 12 yellow-yellow filter improves contrast to lunar craters; Mars, channels and polar caps become more obvious. Jupiter and debate, contrast is enhanced on the blue ammonia cloud belt. # 23 Red-red filter blocks shot almost blue and green light, you have a very strong contrast, for example, between a blue toned structure and bright details on the clouded surface of Jupiter and Saturn. However, this filter is mainly used to observe Mars polar caps. # 82A Light Blue-The light blue filter is suitable for observing the moon, Mars, Jupiter, and discussion. This filter is often used with others, which improves contrast in dim areas without affecting the brightness of the planet. # 56 Light Green-The bright green filter is perfect for observing ice caps in martian sandstorms on Mars and Mars surfaces. It also improves the contrast of red and blue structures in Jupiter's atmosphere. MOON & SKYGLOW-Violet filters are useful when observing polar regions on Mars and completely block red, yellow and green light. With larger telescopes (more than the 12 inch), it can also distinguish some structures in the atmosphere of . Color: picture color Material: aluminum alloy + optical glass Size: 13.5 * 7 * 6 cm Package Contents: 1 x 12 Yellow Filter 1 x 21 Orange Filter 1 x 23 Red Filter 1 x 56 Green Filter 1 x 82 Blue Filter 1 x Moon & Sky Glow Filter 1 x aluminum box Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.