My camera produces .dng (digital negative) files of about 12 MB each and writes them to an SD card that can be read by my iMac (OS X 10.11.2).
I want to know what Photos will do with these files. Can I specify the resolution? Can I edit the DNG file in Photos? The Photos "Help" is no help.
Is there a published description of Photos' import process?
iMac (27-inch Mid 2010), OS X El Capitan (10.11.1)