Minolta Dimage 7's actual focal length appears to be smaller than claimed:
http://webpages.charter.net/bbiggers/DCExperiments/html/d7_focal_length.html
Is the lens on your camera the same?
http://webpages.charter.net/bbiggers/DCExperiments/html/d7_focal_length.html
Is the lens on your camera the same?