The Mamiya RZ Interface for Aptus-II 36 x 48mm Hasselblad V (Universal) Fit Digital Back permits the use of a Leaf Aptus-II digital back on your Mamiya RZ67 medium format camera. This adapter is compatible with the Leaf Aptus-II 22 or 33 back, with a sensor size of 36 x 48mm and a Hasselblad V (Universal) mount.