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[OM] Re: digital/film comparisons

Subject: [OM] Re: digital/film comparisons
From: Winsor Crosby <wincros@xxxxxxxxxxx>
Date: Thu, 05 Oct 2006 11:45:07 -0700
I looked at Clark's site a number of years ago before I ever held a  
digital camera.  At that point he was saying 8MP would be necessary  
to equal film which seemed impossible technically. Not long after  
that I got a 3MP Sony and was amazed. I lost all interest in what he  
had to say. People have a point of view and they rationalize it,  
sometimes very elaborately. Interesting that he now finds that 15MP  
is now needed to equal a 35mm film frame.

Of course there is more to an image than resolution and I think that  
Norman Koren is the only one to try to quantify that using  
information theory.  Astonishingly his results actually correspond  
closely to the judgement of most people who look at images instead of  
the source information about them.


Winsor
Long Beach, CA
USA


On Oct 5, 2006, at 11:04 AM, Chuck Norcutt wrote:

> I've never seen Clark's stuff before and it will take a while to  
> digest.
>   However, the comparison on Luminous Landscape was to Provia 100F and
> not Velvia.  According to Clarks graphs the Provia has luminosity
> resolution up to 12MP but the color information is only good to  
> 7MP.  I
> don't know what Clark's test equipment is but, as we've already  
> seen in
> Moose's tests of the 5D and 300D all pixels are not created equal.   
> The
> D30 has very big pixels.
>
> In any case, regardless of the theory, I (personally) didn't see  
> enough
> difference to worry about.  That's my bottom line.


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