you can grab that package from testing branch
Yesterday I tried that. I received dependency errors. Something about gphoto2 being too new for the version of the currently installed libgphoto2. Likely I need to use updated libgphoto2* packages from Testing. I will try to find time to test that.
I am new to the Debian way and currently am not up to speed with fiddling with repository sources or best practices for downgrading/upgrading packages, pinning, etc.
Although gphoto2 should be (already) installed in LMDE (I don't understand why the package is missing), the root problem is simply getting the camera recognized when connecting to the computer, of which gphoto2 should not be required.
Monitoring /var/log/messages reveals the camera is recognized at the USB level. There log contains an mtp-probe entry that the camera is not an MTP device.
/var/log/syslog has an entry from colord about adding the device.
I see the same messages on a Slackware 14.0 system, which has slightly older gphoto2* packages. I do not have Cinnamon or Mate installed in that system and therefore cannot compare further.
Yesterday in /var/log/messages there was one occurrence of a gvfs-gphoto2 segfault. Today I am unable to replicate that message or discover how to replicate the message.
This is a frustrating (embarrassing) bug. We are installing LMDE for people leaving XP. Canon Powershot cameras are common.
I realize the importance of waiting for Update Packs, but I hope hard bugs like this get fixed as soon as possible. Please let me know how I can help.