You’ll definitely want to get a small selection of eyepieces, as this will give you a range of magnifications. Be sure to also buy a Barlow lens, which will increase the magnification of any eyepiece attached to it. You’ll also need a lunar filter, as viewing the Moon through a telescope can be dazzling and you’ll ruin your night vision. A red flashlight is also essential, as this will protect your night vision while allowing you to read books and charts and write notes.