I took pictures with a Nikon D810 and my Canon T3. I imported both memory cards to my desktop. I opened my Adobe DNG converter program. Unfortunately, only the canon images got converted. What am I doing wrong?!?!
The D810 is a much newer camera, and requires a much newer version of the DNG converter. You need to be running DNG converter version 8.6 or newer. The Canon camera only requires DNG converter 3.4.1 or newer. What version are you using?