A Nagler eyepiece is one of the best eyepieces for astronomy. They are made by TeleVue, a company that has been around for many years and has a stellar reputation for making the best telescope eyepieces out there. The Nagler eyepiece is a top choice because of its field of view, which is very large and makes you feel like you’re observing the object you’re looking at in a very wide field of view.