Macro magnifications are usually calculated using the sensor size not a print out/screen display. Both the second two allow you to enlarge without increasing the information...
A full frame 35mm is 35mm diagonally, with the APS (cropped) sensors being smaller. Not even a larger format camera will get you anything like 137cm (A sensor over 1.3m across the long side)
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Mike
Pentax K5ii & Panasonic G5 user (with far too many bits to list)
Member of North Essex Photographic Workshop
Also online with PentaxUser.co.uk, Flickr, MU-43, MFLenses...
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