Image.

EN: Image.

Fotografie

Two-dimensional reproduction of a subject formed by a lens. When formed on a surface,i.e. a ground-glass screen, it is a real image; if in space, i.e. when the screenis removed, it is an aerial image. The image seen through a telescope optical viewfinder,etc. cannot be focused on a surface without the aid of another optical system andis a virtual image.
Mir glossary