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Any digital back for Mamiya 645 Pro TL? - digital prism 7-inch portable digital lcd tv review

Is that what I say that the Mamiya 645 Pro TL / pair work with the latest camera back can be? 1300USD with 45mm f2.8 and 55mm-110mm F4.5 zoom lens, 2 packages of paper and add additional 1 Power Drive Grip II 401.1 AE Prism Finder FE401, do you think is a good price? But I can only say how very limited new