07-28-2015 09:14 PM
07-30-2015 10:12 PM
There are free versions of post editors. Lots of them! You got several with your camera. Gimp and Darktable and Lightzone are probably the most advanced free versions. They rival Photoshop and Lightroom which are the best there is currently. PS and LR are not free but there is a lower cost version, Photoshop Elements 13.
I would check out Canon's free DPP first.