Eyepieces are tools. And just like any other tool, you have to pick the right one for the job. These illustrations show how different eyepieces vary in their internal configurations and field of view (FOV) — the angular width of sky they display when you gaze into them.
Eyepieces for every application
What's inside your favorite eyepiece? Here's a peek at eyepieces across the spectrum of today's technology.