The North America Nebula wasn't just cropped; it was a tiny, unrecognizable smudge in the middle of a massive, empty black frame. He hadn't just missed the target; he had completely misunderstood his equipment.
The field of view (FOV) is the angular diameter of the sky that can be observed with a telescope or binoculars. It is usually expressed in degrees or minutes of arc. The FOV depends on the instrument's aperture, focal length, and eyepiece specifications.
: While aperture doesn't change FOV, it determines the brightness and detail of the objects within that field. Popular Tools & Resources