![]() ![]() The difficulties occur when the camera is hand-held. One simply brackets exposure with mirror up. If one is shooting a static scene with camera on tripod, there should be no problem at all. Perhaps what is lacking in the current trend of this thread towards the minutiae of ETTR precision, is advice on the practicalities of achieving the desired ETTR exposure in the field, in a manner which allows one to get the shot, or capture the moment. Some clipping is unavoidable with these transformations. ![]() Screen captures from a WideGamut monitor, with image assigned Monitor profile and then converted to sRGB for web viewing. This could cause hue shifts and it is not clear if the increased SNR would be worth it in terms of SNR and color accuracy.Īnd the ACR histograms without exposure adjustment. One would likely use negative exposure compensation in ACR for the ETTR image. However, the UNIWB image can be rendered into ProPhotoRGB by ACR with no clipping. The UNWB histogram shows clipping on the camera histogram, since AdobeRGB can not accommodate the camera gamut at this exposure level. Giving 2EV more exposure moves the RawDigger two stops to the right and near saturation (a good ETTR exposure). Note that the red is no longer blown, similar to what was seen in the camera histogram. Note that the AdobeRGB rendering shows red channel clipping similar to that shown in the camera histogram.Īnd the ACR Adobe RGB histogram for the UNIWB shot at the metered exposure. Here are the ACR histograms for AdobeRGB and ProPhotoRGB for the sunlight WB. The UNIWB preview gives a better preview and shows no clipping, contrary to the Sunlight WB The red channel is blown in the camera histogram, but is 2 EV below clipping in RawDigger. This image shows nominal exposure histograms by the camera and RawDigger (with the green channels averaged) at daylight WB and at UNIWB. The camera was set to AbobeRGB and the standard picture control was chose. Profile Edition allows applying white balance, normalization, equalization (Flat Field), and filtering of outlying values before data export.I've conducted some experiments with daylight illumination (actually 3200K + 80a filter) with the D800e using normal white balance and UNIWB and comparing the camera histogram to the raw histogram as shown by RawDigger. Profile Edition adds selection grids for faster processing of step wedges and color targets, as well as for calculating non-uniformity maps. Profile Edition is for those who need to create sensor calibration data, linearization data, or device data for color profiling. Research Edition adds TIFF export, multiple selected areas via samples, tables of sampled data statistics and histograms over multiple samples, exporting sampled data as CSV and CGATS. It is suitable for a wide range of tasks, starting from personal use and preparing reviews and all the way to programming RAW data processing. Research Edition is meant for camera/sensor evaluation and statistical analysis of raw data. RawDigger is available in several editions:Įxposure Edition is for everyday use and is intended to help those who are serious about extracting the maximum quality from the camera to get precise exposures.Įxposure Edition displays RAW data in all modes (RGB, RAW Composite, and RAW per channel), indicates over- and underexposed areas, displays RAW histogram, image statistics, as well as statistics and histogram for selected area. It helps prepare data for calculations of color transforms and camera profiles. It helps to determine how exposure meters are calibrated, what is the headroom in highlights, which camera setting affect RAW data and how, how a raw converter interprets RAW data and which "hidden" compensation it applies, what tone curve is used for in-camera JPEGs and in a converter. RawDigger can be used to solve a multitude of tasks, including the diagnosis of different problems, such as those with studio lights, lenses, flash, shutter, and aperture accuracy and repeatability, camera drifts, exposure, noise. The primary goals of RawDigger are to help you get better shots and increase the number of "keepers" through better knowledge of the "digital film" you are using, that is, RAW data. In essence, RawDigger is a microscope of sorts that lets you drill down into the RAW by means of visualizations, histograms, and statistics over selections and samples. ![]()
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