Nikon D800 DSLR with 36 MP to be announced on February 7, 2012

"Trevor" writes:

"David Dyer-Bennet" wrote in message
...
Dynamic range is not a weak area of digital, the usable range (that you
can put into prints) is bigger than film was in good light, even with
P&S cameras often (though not universally).

With most P&S camera's still stuck with 8 bit jpegs, dynamic range is
definitely not their strong point. I'd say the exceptions are far from
universal.

You're confusing number of brightness steps with brightness range;
they're not the same thing.

Rubbish, I'm talking about nearly all DSLR sensors (and many P&S for that
matter) true dynamic range being well above what an 8 bit file can handle.
If you think jpeg compression simply reduces "brightness steps" you are the
one mistaken.

Gamma.

--
David Dyer-Bennet, ; http://dd-b.net/
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Photos: http://dd-b.net/photography/gallery/
Dragaera: http://dragaera.info

You're confusing number of brightness steps with brightness range;
they're not the same thing.

Rubbish, I'm talking about nearly all DSLR sensors (and many P&S for that
matter) true dynamic range being well above what an 8 bit file can handle.
If you think jpeg compression simply reduces "brightness steps" you are the
one mistaken.



The dynamic range of a normal 8 bit image file is about 50,000 : 1, of which
the bottom couple of bits are pretty useless making an
effective range of perhaps 10,000:1. That's very good.

If this is unclear, understand "gamma".

Doug McDonald

"Doug McDonald" wrote in message
...
You're confusing number of brightness steps with brightness range;
they're not the same thing.

Rubbish, I'm talking about nearly all DSLR sensors (and many P&S for that
matter) true dynamic range being well above what an 8 bit file can
handle.
If you think jpeg compression simply reduces "brightness steps" you are
the
one mistaken.



The dynamic range of a normal 8 bit image file is about 50,000 : 1, of
which
the bottom couple of bits are pretty useless making an
effective range of perhaps 10,000:1. That's very good.

If this is unclear, understand "gamma".


Am I missing the pre-shot gamma adjustment in my Canon IXUS that will
provide the same dynamic range as my Canon 5D raw? Perhaps you can tell me
where to look in the menu, or just what percentage of other P&S camera's
have it if mine doesn't?

Fact is I CAN adjust gamma for the 5D raw files before converting to jpeg,
but as I said originally, most P&S 8bit jpeg only files do NOT have the same
dynamic range. Perhaps you should try them instead of sprouting irrelevent
theory?

Trevor.