gvfs-mount gphoto2://[usb:002,007]

the address has to be discovered with lsusb first.

Results in:

Error mounting location: Error initializing camera: -1: Unspecified error

gphoto2 (installed 2/25/2017) didn't help uninstalled 2/25/2017)

gphoto2 --auto-detect
gphoto2 --list-files

Give up, use a card reader...