Dynamic Range -- what it is, what it's good for, and how much you 'need'

Started Oct 17, 2011 | Discussions thread
boggis the cat Veteran Member • Posts: 6,324
OK, Joe, show us the proof

Great Bustard wrote:

boggis the cat wrote:

Are you really saying that Joe needs to "explain" to us what DR is?

...on who is included in "us". For people who think:


Compared to APS-C models you don't get 2 or 3 stops difference unless you are using DxO's bogus "DR" ratings.

There is a difference, but it's not large.

when, in fact, the difference is as huge as DxOMark claims:


From your OP:

I'd like to begin with a rather stark example of what 13.7 stops of DR (D7000) offers over 11.2 stops of DR (5D2):

So that's 2.5 stops of DR. (Ignoring the larger sensor size and thus "total light" DR advantage of the 5D II. This implies a roughly 4 stop DR advantage to the D7000 sensor technology, doesn't it? Maybe you should address that, while you're at it.)

Please demonstrate where those 2.5 stops are present by shifting the exposure of that D7000 example you used (before using "relight" or similar tonal modifications), or some other examples where the raw file is available.

Then anyone interested can also assess those same raw files and decide whether the implied DxO DR difference is credible.

well, yeah, it might help if "they" knew what DR is, how it is measured, and how it applies to photography, so that they would be more able to understand what is "bogus" and what is not and show a little restraint with their self-harming posts.

On the other hand, many other people (in the same thread linked above), seem to have a more competent understanding of what DR is, how large the disparity can be between specific systems, when it matters, and when it doesn't.

Like "brightcolors", for example?

Do you mean the thread started by the "D7000 vs 5Dmk2 real shadow noise (DR) test, Mikael Risedal" post, or the "Utility of exposure bracketing" thread that you turned into a clown-fest?

I fully encourage anyone interested to review both threads.

And those people, of course, don't "need" an education, but some might find it interesting to understand DR in a little more detail.

So you are asserting that the OSTF in particular and exclusively has a sufficiently large proportion of people who do not understand what DR is to require your "educational" input.

Or possibly you are asserting that we don't understand what you claim DR is (which appears to be "DxO DR"), as you appear to not follow any argument for practicality in any of these theoretical number-massaging exercises.

In any case, obtain raw files and post your "proof". Then other interested parties can review this and maybe even draw a rational and useful discussion from your typical baiting post.

Or just keep up the clown-dance. Your choice.

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