Question

question 2
the camera body is also referred to as:
the internal optical system
the viewfinder
the eyepiece
the external optical system

Explanation:

The camera body houses the main components of a camera and is not equivalent to the view - finder (used to frame the shot), the eyepiece (part of the view - finder system), or the external optical system. The internal optical system is often contained within the camera body.

Answer:

The Internal Optical System