Originally posted by Squier Lowell - i'm pretty sure it wasnt truncated. At least, it doesnt look that way.
I shot a .DNG to show you the Exif.
It seems the screen shot information is from FastStone MaxView. Is that right?
I also use FS and I am getting the same information with all Pentax lenses and cameras. Same with my friend's Canon bodies and lenses. However, both of us are getting correct max aperture with compact digicams.
My conclusion: either bodies with interchangeable lenses (or just DSLRs?) do not store max aperture information in EXIF (at least not Pentax DS, Pentax K10D, Canon 300D and Canon 500D I just verified), or FastStone MaxView does not know hot to read that information.
In either case ignore the reading, it is not relevant anyway.
The actual used aperture is correctly displayed.