[filmscanners] Re: Filmscanners - is this about as goodasitgets?

[Bob Frost]

Julian,

As I said at the end of my last post, Nikon Capture allows you to alter the
'exposure' of the Nikon raw file by +/- 2 stops, so presumably the 'normal
exposure' tiff or jpeg has had 2 stops chopped off each end.


As for your last point, you just need a different sort of projector - to
project your files via a laptop. Presumably they will eventually take CF
cards or microdrives as some printers now do, bypassing the computer (or
perhaps I should say including it in the projector).  Not sure how good they
are yet, and rather pricy. Conversion to slides via a film recorder is also
pricy, not very good from what I hear, and backwards looking.

Bob Frost.


- Original Message -
From: Julian Robinson [EMAIL PROTECTED]

Can someone enlighten me?  And what are the figures for modern cameras
for  what I will call here dynamic range?  And what range do they expand to
for presentation in the final, non-raw image?  Does the user have any
control over this?


Finally one thought - not much in the way of slides from a digital camera.



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[filmscanners] Re: Filmscanners - is this about as goodasitgets?

[Julian Robinson]

At 12:02 28/01/03,  Paul wrote:
Digital's contrast range is the ratio of the clipping level to the noise
level. That's bigger than 7 stops. My DiMage 7 is more like 9, meaning that
the amount of noise I see on the 12-bit digital output is about three bits
or less. From what I've read, the 35mm CCDs are much quieter still.

I have got not argument with this.  The medium is capable of recording more
than fits on the available brightness range of paper.  But digital cameras
have to process the image somehow to get presentable contrast on paper.  If
they print a whole 9 or 12 stops on paper it looks too low contrast, no punch.

Even if they record as much range as negative film, the fact is that they
do not display, or make available all this info, while the film does  keep
it all.  Just as nobody prints all the info stored on a neg because the
result is appallingly washed out low contrast, no digital camera that I
have heard of outputs the unadulterated full brightness range photo. People
would be returning them in droves.  So they do clever things to pick which
range we want to see, and output that instead, just as a photo processor
does with negs.

What I am after is a digital camera that has an option to output the full
range it is capable of recording, even if that is low contrast.

Julian
Canberra, Australia

Satellite maps of fire situation Canberra and Snowy Montains
http://members.austarmetro.com.au/~julian/cbfires/fires.htm


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