exter1

Hi. I have an original 6x8 screen on Mamiya RB67 whitch a little bit more wider than standart (im think its gives some advantage and real 6x7 frame in viewfinder), but in the manual i'd find this: "Type A 6x8/Matte use for power drive roll film holder 6x8 ONLY" Photo of mine manual with this: Imgur: The most awesome images on the Internet My question is: WHY? Thanks.