Originally posted by Steve.Ledger Medium Format Digital Camera and 35mm Full Frame Camera is either a very poor translation or they are claiming it is both formats in one.
Click the link and read the page. It is very clearly saying MF is better than FF. But, it is also clear that there is some translation issues, and the page title does make you wonder. The text on the page however leaves no doubt.
"The field extended by PENTAX 645Z is the world of [Master] for people who aspire to Medium Format ranked higher than Full-Frame."
"Since PENTAX 645Z is equipped with a large-size sensor, the lens used has a longer focal distance and a larger diameter than the one used for cameras equipped with 35 mm-format sensor. Therefore, when the same scenery is taken by PENTAX 645Z and 35 mm Full-Frame Camera under almost the same conditions and with the same angle of field, PENTAX 645Z having a high resolving power is able to send more information to the sensor. The sensor receiving that high-density information is featured with super high definition of approx. 51,400,000 valid pixels. Coupled with the state-of-the-art image processing, PENTAX 645Z realizes high-definition and stereoscopic depiction far exceeding cameras equipped with 35 mm-format sensor."