Select photos by upload method?

Is there a way to select observations where photos were uploaded from the app? Alternatively, is there a way to select photos by camera? I’ve notice some photos don’t seem to have camera information. All photos from my DSLR would have that information. Some from my iPhone do, some don’t, but I’m not sure why - haven’t done tests yet.

Anyway, I would like to know what observations I have with a particular tag that don’t have my DSLR model in the exif of attached photos. Possible?