[filmscanners] RE: Newish Digital Tech

["Paul D. DeRocco" <pderocco@ix.netcom.com>]

> From: David J. Littleboy
>
> Everyone except Foveon does exactly that.
>
> Look at the resolution charts. Other than the Fuji S1/S2, all the Bayer
> cameras are quite reasonable about not producing false information, and
> returning a gray blur for patterns they can't resolve. The SD9
> returns false
> data.
>
> Your "diffuser" is called an "anti-aliasing filter", and there are only 2
> digital cameras (of the cameras I'm aware of) that don't use one:
> the Sigma
> SD9 and the Kodak 14n. Without an anti-aliasing filter, Bayer sensors
> produce the hideous color Moire Foveon shows on its lying snake oil web
> site.
>
> It's absolutely necessary on a Bayer chip: it's a disaster
> without. My claim is that it's necessary on a Foveon chip too.

I don't know who uses diffusers and who doesn't. But the fact that the first
generation Foveon chip in the Sigma camera doesn't have one says nothing
about the intrinsic merits of the X3 sensor mechanism.

> Yes. All of them have special-purpose DSPs. The last 10 years has seen a
> phenomenal increase in chip size, complexity, speed. And special-purpose
> hardware is always faster than general-purpose.

You may be right about that. I haven't taken apart either of my digicams,
nor do I have service manuals. I'd be curious to see any pointers to
descriptions of the hardware inside a consumer digicams.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@ix.netcom.com

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