Copied from Phase One site:-
P 45+
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
Storage files
Phase Ones IIQ RAW file format speeds up the image capture and file transfer. Increases the storage capacity by turning the full 16 bit image data into a compact RAW file format. The default IIQ RAW-large format is completely lossless.
llQ small: 27 MB
llQ large: 44MB
Phase One - Digital Backs - Digital RAW Software - Capture One