Equipped with eyepiece: H6mm, H20mm, multiples are 300/6 = 50X, 300/20 = 15X Plus 1.5X the positive lens again, multiples are 50 x 1.5 = 75X, 15 x 1.5 = 22.5X Please screw the moon filter into the threaded of eyepiece lens' lower part, and then connect the eyepiece lens with zenith lens. Moon Filter: Because there is a lot of reflected light interfering our obation of full moon, so we can use the moon filter to avoid the interference, and then the moon's will be seen more clearly. It is possible to ob craters on deep space bodies such as the Moon, Jupiter, , Mars, and Nebula.