I see many digicam reviews on the Internet and in a lot of them the reviewer say that a bad thing is that the camera does not support the raw format. I have a Panasonic Lumix which support the raw format. I tried to use but what I see is only a canvas and a very large file for a photo of 70 MB. Do I need any program to open this file? Seeing that this format is too large I hope to have a very good quality if this is what the raw format does.