Use stream of consciousness to answer the following. A mirrorless interchangeable lens camera (MILC) is called mirrorless since it does not have an optical mirror as in SLR (single lens reflex) cameras. Interchangeable lens means it has a capacity to interchange different lenses to shoot photos at different depths of field. MILC is a further evolution phase of SLR cameras in which the optical mirror is replaced with a digital mirror.

Answer this question based on the passage: what does it mean if a camera is mirrorless?
The relevant information is: A mirrorless interchangeable lens camera (MILC) is called mirrorless since it does not have an optical mirror as in SLR (single lens reflex) cameras. Final answer: it does not have an optical mirror as in SLR ( single lens reflex ) cameras.