with optional adaptor, P45 fit most brands of medium

Models of P+ back
Phase One H101: Hasselblad H1 and H2
Hasselblad V: Hasselblad 555ELD, 533ELX, 503CW and 501CM
Mamiya RB67 and RZ67 Pro II
Mamiya 645: Mamiya 645AFD, 645AFDII, RZ67 Pro IID
Contax 645: Contax 645AF

Imaging technology
CCD: Full frame CCD
Lens Factor: 1.1
Resolution: 39 mega pixels
Active pixels: 7216 x 5412 pixels
CCD size effective: 49.1 x 36.8 mm
Pixel size: 6.8 x 6.8 micron
Image ratio: 4:3
Microlens on CCD: No
Antiblooming: 10 f-stops
Dynamic range: 12 f-stops