Apparently Match Total Exposure on Lightroom only works if the Metadata has the aperture information and shutter speed.

My lens has no electronic connection with the camera because are Nikon lens on Canon with adapter.

Which is the way to change the aperture on Metadata file. It needs to have a number there....

Best

Hi, in the metadata menu you will find the option "Define Aperture (lens tagging)" it's meant for that