The Horseman Retro Fitting Sliding Adapter is designed for Horseman L series cameras that come with detachable rear main frame. This digital and film back adapter can enable any Horseman 4x5 camera to be used with medium format Phase One, Leaf, Hasselblad, and Sinar digital backsThis digital and film back adapter is compatible with the 450, 450EM, 450EMII, LM, LM-C, later LX and LX-C, LS, and later LE cameras