For others that might experience similar difficulties this is a step by step guide:
1. Plug in usb digital camera and turn it on in download mode.
2. Open a shell and type
Code:
cat /proc/bus/usb/device
3. You should be able to see the camera details from the output. You need the Vendor= and ProdID= details. In my case Vendor=04cb and ProdID=01c5.
4. As root open the file /etc/udev/rules.d/30-libphoto2.rules and search for the vendor ID eg in my case 04cb. This list devices from that manufacturer, but not your device.
5. Copy one of the lines that contain the vendor ID and insert your relevant vendor and product IDs into the copied line.
6. Save the file and reboot.
That's it. When you plug your camera in as a user it will work
Alan