Actually, this is a poor concept. The DR is divided equally (as far I know). Using the base ISO basically kills a good part of the camera DR capabilities, as the sensor is unable to capture below a sensitivity that needs to be determined by experimenting. I use a D850 and a D500. The D850 needs ISO 800 to get an optimal DR (14DR) the D500 overs between ISO 800 and 1000. To check, I use a Black Grey White target. Then I check the color noise in the black, then in the grey. That is why I mentioned earlier to use a dynamic range that starts at ISO 800. This number, of course, depends on your camera capability to capture the dark.

When testing I use ACR I do two things first:
► Optical correction
► Aberration
► Defringe
► Then I reduce the color noise to 0 and check the darker grey areas for visible noise (600% magnification and above). If the noise is minimal (acceptable) I have my lower ISO for the range.

When I PP a capture, I do the exact same thing, but I adjust the slider to remove the color noise, usually around 10~12. ACR over corrects. (see samples)

 

Today I was the witness of a conversation between two 'photographers' who obviously did not anything about their cameras...

Both complained of the lack of sharpness.

Turns out they both use the infamous VR, expecting it to be the cure of all ills.

They demonstrated an ignorance I could not believe. VR 'allows for a lower speed' That is inherently wrong. Sure, there is some truth in it when dealing with a static object, but a moving one? That is wrong. The subject motion is and must be what determines the speed used if one wants tack sharp capture. You can play with the dof or ISO, not with the speed.

Then they did not take into account the type of sensor array their camera has, such as the density of it. The smaller the individual sensors are, the faster the shutter speed needs to be.

Then there was their use of JPG which opens yet another can of worm.

These two are 'shooting' weddings, more like a terminal execution in my opinion. A firing squad should be the next step, as in 'YOU ARE FIRED!!!'.

The issues are, again, in my opinion., a near complete ignorance of their cameras' capabilities and utter misunderstanding of what DR does and where.

VR helps stabilize the camera lens combination when hand holding it. It does not compensate for the subject motion at all.

So if your shots are not up to your expectation first and foremost check your capture speed. Since dof is an important part of having your subject within the acceptable field of sharpness*, the only setting you can use is the ISO setting. And to use ISO effectively, you need to shoot raw and know your sensor capabilities (DR as well as optimal ISO for invariant sensors). If using auto ISO the lower limit is the one that allows for the minimal speed to use in order to capture an image that is sharp.

In short, stop complaining like these two and take the steps necessary to reduce the throw-away due to lack of sharpness.

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* I do not use depth of field because the acceptable field of sharpness is shorter than the depth of field, even if the two terms are used interchangeably by many.