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The images are rendered for a certain type of display, and the look is baked in.Ĭamera log spaces such as S-Log and V-Log are scene referred. Standard cameras record into a display-referred color space: the signals are meant to be sent to a monitor for display, without any manipulation. If you want a purely technical description: īut if you want some context, basically V-Log and V-Log L are the same idea as Canon Log or Sony S-Log, though with specific differences. #INCAMERA METER CALIBRATION RAWDIGGER FULL#And in some circumstances, you'd get banding if the jump is too big.Īnd if this is the case., then why compress the luminances into such a narrow range? Why not scale it to the camera's full luminance range, and preserve as much of the "in -between" luminances as possible? If your camera has a range of, say, 1-1000, then why reduce the image to 300-700?Īs I said, I don't think I'm understanding this correctly. Thus, each luminance value would be doubled: 1 becomes 2, 3 becomes 6, 42 becomes 82, etc.) There'd be no real increase in the range of luminances. Say I have a photo with luminance ranges from 0 to 100, and I scale that to 0-200. It seems to me that if you take a narrow range of luminance, and scale it to a larger range, you don't get pixels with in-between values. I don't mean that it leaves out the highs and lows. But doesn't this mean that the color palette leaves out a lot of value? This enables color graders to "stretch" those values, and thus, have some play with the midrange gamma. V-log delivers a very flat image, where the darkest elements are greyish, and the lightest elements are bright, but not completely blown out. If someone could explain this to me, I'd be grateful. Nb: the visualization in CaptureOne is not how things look in the camera's EVF.I re-did the experiment because as I've told other.I think I'm misunderstanding something about the virtues of v-log and flat profiles. Nb: the visualization in CaptureOne is not how things look in the camera's EVF. Notice that the JPG with no warnings is saying there are no blown areas but the raw says there are. The optimal choice of JPG for DR is a subject for another thread but this shows that it's a useful topic to explore. Interestingly, if you shoot JPG you are altering the OE/UE limits by your choice of Creative Style and this clearly shows that. The OE/UE warnings are "on" for all four shots. #INCAMERA METER CALIBRATION RAWDIGGER DOWNLOAD#If you download it you can tell which are which but it should be pretty obvious without looking at the filenames. The screenshot here is all four images in CaptureOne which shows OE warnings clearly. While a histogram might or might not show OE, the zebra is accurate and precise and, of course, shows where in the image it is warning. In this way, the JPG is not providing the zebra read-out because it's been calibrated with actual results. My calibration is based on one particular Creative Style that I find best for Live View. Since I never ordinarily change the Creative Style settings because I don't shoot JPG, this difference does not affect the accuracy of my zebra calibration. The difference is attributable to the Creative Style setting. ![]() And there is some visual difference in the zebra warnings when taking the pictures. In both cases, the zebra warnings were present when I took the shots.īUT the EVF display IS based on the JPG (that does not exist yet) as predicted by Sony's live view. The raw file is not affected by the Creative Style nor the Live View. The blown parts are white feathers on Pelicans. ![]() The two raw files are identical and both show the green channel blown to the exact amount, even to the number of pixels over the possible value. I varied the Creative Style settings so as to emphasize the difference. #INCAMERA METER CALIBRATION RAWDIGGER MANUAL#I used the same manual exposure for both. ![]() I took two shots of my computer screen, each one set for raw+jpg and deliberately overexposed so as to show zebra stripes. I re-did the experiment because as I've told other people in other situations, if you ask the question differently you may get a different answer. ![]()
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