http://www.pentaxforums.com/news/pentax-q7-first-impressions.html
I think the only useful information that is provided is the following:-
"The Pentax 03, 04, and 05 lenses do not support the Q7's larger
sensor. These lenses will automatically be used in a crop mode on the
Q7. With adapted DSLR lenses, the crop factor has changed to 4.5x, down
from 5.6x."