A camera uses convex lens to form an image which is:

A camera lens is designed to accept a wide view and project it onto a small electronic sensor or a tiny piece of film. It is a real image because it is formed by projecting light. When a convex lens is used, a real image always inverts upside down compared to the object. Also, because a large object from the real world, such as a person or a building, has to fit on a very small sensor, the image is also diminished.