Petie53 wrote in post #18492480
I believe the image shown on the back screen is a JPEG version of what was just shot. So if you are shooting RAW pictures what you see on your computer screen will be unprocessed uncorrected images. I shoot both JPEG and RAW as I am terrible at processing so save the RAWS for the future if my skills ever developed. Several of the in camera settings affect the JPEG images.
Raw files are not viewable, they are always processed, whether in-camera by Canon's software or DPP for the raw, or LR. You are always seeing some form of a processed raw when viewing on any device.
The question here though is that the LCD brightness is obviously set pretty high giving a false impression of the actual exposure. The LCD should not be used for gauging exposure. In fact, I usually set my LCD a bit lower anyways to make sure, but the histogram is the only way in-camera to measure your exposure.
That histogram does, however, reflect the JPG result, so picture styles, etc all can have an impact on that histogram, but it is still the only real tool to use for exposure, the LCD isn't.