This SVBONY seven-piece accessory kit enhances the performance of your telescope. Includes two 1.25" Plossl eyepieces, a 2xBarlow lens that can be used visually or photographically, three eyepiece filter and a Portable bag. Plossl 6mm eyepiece ideal for observing details on planets, the Moon, and other celestial objects. Plossl 17mm eyepiece is suitable for observing a variety of celestial objects, including star clusters, galaxies, nebulae, and even some planetary details. 2X Barlow scope provides 2X magnification for visual observation and astrophotography, magnifying more details of planets, the moon and other celestial bodies, thus enhancing the observation experience. 82A light blue filter. Planetary Observations: Especially beneficial when viewing planets like Saturn or Jupiter, where it aids in highlighting banding and storms. Lunar Observations:Enhances the details of craters and maria on the Moon's surface, providing a clearer view during observations. Moon filter. By decreasing brightness, moon filter improve the contrast between the illuminated and shadowed areas on the Moon's surface. 0.5x focal reducer cuts the telescopes focal length in 0.5 times of original's to get a wider field of view; Lower magnification and wider field of view;shorter exposure times for astrophotography when you are using the SVBONY 1.25" 0.5x focal reducer. It can reduce the telescope focal length to the 0.5 times of the original's;it's also great for visual use for a bigger FOV.