Archived posting to the Leica Users Group, 2000/03/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Regarding "Film Flatness": It would appear that the people at Franke & Heidecke in Braunschweig encountered the problem of "film flatness" quite a long time ago in their engineering of the Rollei cameras. At least two models of their 2¼" square format reflex cameras [I owned a Rollei flex F and also a Tele-Rolleiflrx with this feature] offered optical flat glass plates located in the image plane, ahead of the film, to offset the tendency of the 120 film to "bow" or "buckle-out" in it's location in the aperture of the image-making portion of the cameras. It appears that the pressure plate by itself in a single plane did not correct the geometry of the film in this critical area. It is reasonable that the film would present a very flat surface to the image with this feature. I do not know that Hasselblad ever offered such a feature although it is certainly reasonable to assume that their engineers would aware of this design? Bill Carson, KE7GM@earthlink.net