I was watching a Creativelive.com class and the instructor was talking about off camera lighting and making sure that all of the light was within 3 stops of the main or key light. This was to ensure that all of the light was within the capture range of the camera. Now 3 stops was the number that he used because he assumed that his camera had a 5 stop total tonal range. He then postulated that he'd lose the top and bottom of the range, as it could not be pushed any further. Being a bit of a nerd, I then looked up the K-5's dynamic range (I know its great, but I wanted specifics). So at the basic settings using the extended dynamic range of 80 iso on the highest quality, this website indicated that the K-5 raws had a 7+ dynamic range with the least amount of noise. At the lowest quality that number jumped up to 14 stops. Working with the 7 stops, and discarding the top and bottom of the range, that leaves 5 stops. So here are my questions: 1. The dynamic range of the JPG preview is different than what is in the raw file. Is that correct? 2. If so, then what is the best setting for the K-5 jpg file to capture the most dynamic range (assuming that the highlight and shadow protection is turned off). This is important because I would be trying to make sure that the data that is captured is within the dynamic range (+/- 2 from the key exposure) and not blowing out. But if this changes between the capture jpg preview, then how will I know that I have blown out the image or got enough shadow detail? Do I have to adjust for this based on each jpg style? 2b. Is it true that the histogram is also based on the jpg file and not the raw file? If so, then the histogram also does not give a true representation since the jpg will blow out much sooner than the raw file. 3. Assuming 18% gray is the middle stop, does that mean that I have 2 stops below and 2 stops above in the dynamic range? Again, measuring with an external light meter. 4. Or does the dynamic range refer to just the amount of light captured at all times in the raw file? So if the scene uses matrix metering, then k-5 will evaluate to try to fit the entire scene with the dynamic range as best it can? If so, does the K-5 look for middle gray or does it do its calculations based on the scenes total tonal range? Thanks!