The K3 III in the comparison tool

flektogon wrote:

Hello KPM2,

Well, your thread actually revealed one, maybe a really problematic side of the raw file processing. As you found, two different photo editors opened the same raw file applying different parameter settings. Like one used the sharpening amount of 45, while the other 0. And, as few responders replied, maybe both editors applied the same sharpening amount, just they use different "measures". And this might be a source of worryings. Imagine, you want to sharpen your image a little bit more, so you apply a value of 10. When you (re)save such processed raw file (using the first editor), that sharpening parameter will be saved as a value of 55. And now, when you open it with the other editor, you will end up with over-sharpen image!

These parameters, or metadata, are stored in different groups in the file.  The Pentax parameters for sharpening, contrast, etc are stored in a Pentax group.  When you set parameters in LR they are stored in an Adobe group (perhaps in the file, perhaps in a seperate XML file, perhaps in the LR catalog).

I am not any expert in the Adobe raw data spec, but I thought that every photo editor would use exactly the same measures for the same image parameters.

Do not assume that they are using the same algorithm to o sharpening - there are many.  So the parameters are not necessarily interchangeable.

Of course, these problems will become evident only if you open/process raw file (actually you don't even need to modify any image parameter!) in one editor and save it as the original raw file replacement.