Quote:Actually this is incorrect - it's about 50cm.You once wrote that the testing distance is 51x the focal length (that that is not the case apparently, is not on me). Besides that I forgot to take the crop factor into account, which was silly.
Object size = 900mm
Image size = 13mm
Object distance = 500mm
-> focal length 7mm for MFT
0.5m is also the hyperfocal distance at 7mm @ f/5.6, BTW.
The hyperfocal distance at 7mm @ f/2.8 is 1.1m.
Hyperfocal distance = depth-of-field of half that distance to infinity - assuming a flat focus field that is.
And the hyperfocal has very little to do with macro photography. It is a guidance for landscape photography.
Hyperfocal distance should be a thing of the past. Unless one dislikes getting the best results. It is a theory from when print size and resolution usually were limited.