So if the DR of 5dIII is for 1920X1080 (2073600 pixels) output and BM is 2432X1366 (3322112 pixels) we have to normalize the later for 1920X1080 output. Thread starter 14 just fond this interesting link, that shed some light on this matter (I learned a few things as well). Use sigma column (4th field in RawDigger statistics) as variation /noise/ estimation. To make a fair comparison we have to compare at the same output size. This is also the case for the Z9, as it was tested by various 3rd parties and the dynamic range seems solid / inline with D850 & Z7 (despite lacking the M shutter). it's what DxO measures as "Display DR" and what BlackMagic reports as DR. has long been a debate in digital processing circles about how much detail (and Dynamic Range). This is the so called "engineering DR" for a single pixel. 1) you image is underexposed - use tools like rawdigger. This way you have the "Max Level"ĭynamic range is Max Level/Noise floor.
Then find in exif data (exif button in RawDigger) the "White Level" value and subtract from this the exif "Black Level" or better subtract the avg value (rawdigger display) of the inspected channel. This way you have the "read noise" or else the "noise floor". The displayed values are the stdev of the black frame which stdev is the definition of noise in engineering. Load each photo into Lightroom and play with black and white sliders until you reach clipping points. Shoot exactly the same scene (ie - framed the same way) with same lighting with both bodies.
#RAWDIGGER DYNAMIC RANGE MANUAL#
Open the black frame DNG with RawDigger, go to "preferences" and disable "subtract black" and then read the values under sigma (σ). Using manual mode, set ISO, aperture and shutter speed the same in both bodies. The histograms use this range of values as well. I like that the pixel values go from 0-16384 reflecting the 14 bits per color channel in the raw file. I'm curious, how do you mesure DR using black raw frames? whats the process. I like the ability to see each individual color channel R,G,B,G2 and the min, max, avg and std dev for each channel as well as over and under exposure percentage by channel.
0 kommentar(er)
