1. A document processing apparatus with an inlet and an outlet comprising: a document transport system having opposed transport members for moving documents serially along a generally straight line document path from the inlet to the outlet; an optical system located between the inlet and the outlet and having a first pair of mirrors to direct the image from one side of the document at a first location along the length of said document to an aperture, said optical system having a second pair of mirrors to direct the image from the other side of the document at said first location along the length of said document; and, a removable camera module having a lens with an optical axis and film such that when the camera is attached to the apparatus, the lens is aligned with the aperture to receive the image from the optical system.
8. The apparatus of claim 1 wherein said image is directed from said first location as said first location of said document passes over a glass imaging region.