For those who do not care about the details of how a picture was created, Exif data has no use, so I happily use any lens or adapter and only watch the results.
Admittedly, not a very scientific method if one wants to reproduce or improve on results, i am also among those who regard glowing technical info in the viewfinder and a phletora of camera buttons as unwelcome and sometimes destructive distractions. A neo-luddite can save mountains of time and cash by simply ignoring such frippery.
p.