I tried to take several pictures with a DSLR ( Nikon D3200 - 18 to 55mm zoom lens) with manual focus mode. I changed the manual focus randomly and clicked several pictures one after another. I was expecting to see the change in the manual focus somewhere in the metadata of the camera. However, no change was visible. All the pcitures I took had identical metadata with focal length, aperture, shutter speed, ISO, etc.
What parameters are triggered by rotating the focus of the lens? Shouldn't it be the focal length?