What is the purpose of having glass in the PolaPlus Polaroid magazine?
purpose of the glass plate in the Polaroid film magazine is to move the image to
the exact film-plane distance. Since the Polaroid film magazines are made to
protrude at the top of the camera, to allow their use on EL models, the
magazine hooks on the camera are in front of the Polaroid film pack preventing
the film plane from being at the same position as on other film magazines. It
is slightly further back. This glass plate restores the image distance.