Srs, I´m having problems installing Gphoto onto Raspberry Pi :

sudo apt-get install software-properties-common
sudo apt-get install python-software-properties

pi@raspberrypi ~ $ sudo add-apt-repository ppa:mutlaqja/ppa
You are about to add the following PPA to your system:
Latest INDI Library and drivers!
More info: launchpad.net/~mutlaqja/+archive/ubuntu/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it
Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 167, in <module>
sp = SoftwareProperties(options=options)
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 105, in _init__
self.reload_sourceslist()
File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 595, in reload_sourceslist
self.distro.get_sources(self.sourceslist)
File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 89, in get_sources
(self.id, self.codename))
aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Raspbian/jessie

Any help would be appreciated, regards!!

Are you running the latest Raspbian distribution? You just need to download the RPi file from the download section and install it following the instructions on that page. I don't believe you need to add the ppa.

I have documented the steps I use to get my RPi up and running here in this thread, you could try this and see if it works:
www.indilib.org/forum/ccds-dslrs/783-indi-dslrs-faq.html

You cannot use the PPA on Raspbian, it's ONLY for Ubuntu. Go to the download section and download the Raspberry package.