When I have done everything to put the priority on clipping the reds it does not show up in the red that you have posted above, if you look at my first image I have clipping shown as blue patches in my first image. My greens are way out in front to clip in normal daylight first.
Here is what it would look like without this prewb filter I feel Highlight reconstruction has done a great job considering it is guessing the tonal ranges it applies to the clipped areas (which the literature freely acknowledges).įirst time I have used it - may use it more in the future when I find I have stuffed up the exposures.Where you think you are showing chipped and what you think is clipped is not from being overexposed and blowing the red with a that exposure, where a lot of people think reds are overexposed are not found in the areas contained with in the raw files reds.įor this image I used a cc30m filter to pre WB the light so that the red channel is closer to the green channel as to where they would clip this way I can maximise the red channel information I can store in my sensor. Highlight reconstruction applied in Darktable. Image 1890 - 2 stops over what I consider ideal exposure and one stop clipped as far as I am concerned.
Other than motion blur and different focus the 7th is fully recoverable with a little more wiggle room allowed in the exposure before the raw is clipped. Here I have WB for that difference and just applied a tonal adjustment to reveal the detail in the red sweater ( just quick tweaks), one side the first image and the other the 7th image mirrored. this would tell me that there is a stronger light source for the last image from directly from above is warmer. This has changed how the areas that are in more direct light from above show a slightly different color cast, while the areas in that are mainly being supplied light from the reflected surfaces from around the sweeter don't have this color shift. So effectively losing 2 stops of DR !I will add that there has been a shift in the temperature of the light in between the 1st and the 7th image as you can see in the raw histogram, it is slight but it is there.
Thanks for the confirmation which now suggests the image chosen as a 'correct' exposure is actually two stops from clipping the red channel. Including this nonsense which does not deserve an answer. And as you seem to want to be mildly agressive I will reiterate that your testing and conclusion appear to be flawed. I suggest Lab values as then there is no colour ambiguity when using different working spaces If not then you may indicate a ROI that must be a particular colour and supply the values for that area. Now should the colour or any other aspect be wrong in your opinion then it should be obvious what you need to do to correct in your application. Bearing in mind this not taking into account the fact of adjustment by the editor under the hood. The attached gif once again showing no clipping even with one of the Adobe standard profiles or the Pentax embedded profile in place. You may also note that the red value is nearly at +3EV and you may also wish to check back what I said about taking a meter reading of a specific area and increasing the suggested exposure by +3EV which may get you very close to saturation - this represents a meter calibration point of 12.5% which may be representative of your system, there may be even a little more at a pinchĪs already hinted the raw editor application of profile can make a huge difference to how the render appears and this will be reflected in the histogram. See attachment of a view of your raw data for this image. Shows zero signs of clipping either in Rawdigger of ACR - I have never seen clipping without an associated histogram climbing the wall. From what you said about your method of placing red value to the right in camera histogram (you are increasing exposure) then subsequently you are increasing exposure by +0.3EV your value of +2EV is probably actually close to +3EV as shown below Just the one image that you claim overexposed (assume by this you mean from the metered reading?).
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