On Sat, 12 Jan 2019 11:22:32 -0500, nospam
wrote:

In article , Eric Stevens
wrote:

dxo is reporting the dynamic range of various *cameras*.

and even if you ignore the 14 bit issue, their numbers are highly
suspect.

the nikon d800 and d800 are identical cameras, the only difference
being the lack of an anti-alias filter on the d800e, something which
does not affect dynamic range (only aliasing). thus, the results should
be *the* *same* (other than alias artifacts on high frequency content).

Light passes through the filter which affects the spectrum detected by
the sensor. Of course this will affect the dynamic range.

nonsense. an aa filter has *zero* effect on dynamic range.

You know that do you?

yes.

Show me the data.

show me the data that it does.

Google shows that a hell of a lot of work has been done on the
spectral properties of anti-aliasing filters. You should write to all
the authors and tell them they are wasting their time.

spectral properties aren't the issue.

Of course it is, unless the AA filter has none. The light which
determines the RGB image has to bass through the filter and some must
be lost on the way.

the only thing that's lost is *spatial* *detail* above nyquist (and a
little below since this is the real world).

below nyquist, there is no effect, and a grey card or other test target
has essentially no detail, so it's *well* below nyquist.

if they were shooting resolution test charts or scenes with fine
detail, there would be a difference, as one would expect, but they're
not, at least not in this test.

All of this is irrelevant. The point is no solid is perfectly
transparent. Certainly the material of the AA filter will not be.

you claim that dxo is shooting grey cards in their testing, which does
not have detail anywhere close to nyquist, therefore the presence or
absence of an aa filter will have no effect whatsoever.

You are not even reading what I say! I said nothing of the sort but I
have several times stated what it is that DxO do. Now you seem to be
arguing without having read or understood what it is you are arguing
about.

actually, i am reading what you say, which is well beyond ludicrous at
this point.

Nowhere did I say they used a grey card. I compared their method to
using a grey card. DxO have described their method in one of the URLs
I have posted. It is now obvious you have not properly read or
understood their description. Nor have you properly read and
understood the sections of their descriptions which I have quoted. You
have not even properly read or understood my paraphrasing of what DxO
have written.

As you so often have been accused, you have been arguing for the sake
of arguing but without even paying proper attention to what you have
been arguing about.

--- snip ---
--

Regards,

Eric Stevens