So i'm fairly new to the raw concept. With my first set of raw images I imported them into iPhoto (system default at the time) Then I installed Lightroom. After that I imported from disk the photos from iPhoto. I notice that the photos have the .jpg extension in LR. Does this mean they are not in RAW format? Do I have to directly import the RAW images from the camera for this to work? Please help me to understand this RAW importing...and maybe a general description of RAW images too would be nice! Thanks in advance.