Archived posting to the Leica Users Group, 2001/11/04

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Subject: Re: [Leica] Re: Vs: digital
From: George Day <george@rdcinteractive.com>
Date: Mon, 05 Nov 2001 06:56:38 +0000

"not compatible"?  Whatever. Seems to work just fine for the well over 90%
of photojournalists shooting Nikon and Canon digital.  I'm sure it would be
quite adequate.  These are lenses, not spiritual beings.

on 11/5/01 12:03 AM, Jim Brick at jim@brick.org wrote:

> I have and have used over the past three years, a Philips 6mp chip. It is
> laid out in quadrents and all four quadrents must be read in
> simultaneously. The data is seriously convoluted and takes "major"
> electronics and firmware to put it back into the proper order as if it were
> a normal CCD. And to do this on the fly for six million pixels, and then do
> interpolation, color space conversion, PRNU (dead or damaged pixel repair),
> etc... is a major operation. So I suspect that the task was a bit
> overwhelming for a consumer level camera.
> 
> The CCD I have does work and does take photographs. Perhaps Philips
> re-designed it and introduced new problems.
> 
> As far as an M mount digital camera goes, as I have said numerous times
> before, the resolution and MTF curves for modern M lenses is not compatible
> with imaging on a CCD or CMOS sensors.
> 
> Jim
> 
> 
> At 12:48 PM 11/4/2001 +0000, George Day wrote:
>> No kidding?  What sorts of problems?
>> 
>> on 11/4/01 7:24 PM, Raimo Korhonen at raimo.korhonen@pp2.inet.fi wrote:
>> 
>>> Well, Contax/Yashica/Kyocera do not have the chip either - it is
>> designed by
>>> Philips and they seem to have problems with it. Pentax already dropped
>> their
>>> camera which was to use it.
>>> All the best!
>>> Raimo
>>> Personal photography homepage at
>>> http://personal.inet.fi/private/raimo.korhonen
>>> 
>>> -----Alkuperäinen viesti-----
>>> Lähettäjä: George Day <george@rdcinteractive.com>
>>> Vastaanottaja: leica-users@mejac.palo-alto.ca.us
>>> <leica-users@mejac.palo-alto.ca.us>
>>> Päivä: 04. marraskuuta 2001 19:17
>>> Aihe: digital, was: Re: [Leica] Piezo Plunge
>>> 
>>> 
>>>> Well,
>>>> 
>>>> This has been beaten to death, but a digital M-mount camera would make all
>>>> the sense in the world.  Not for the purist, of course, but you can
>> bet many
>>>> an amateur and working photographer on pounce on such a beast.  If Leica
>>>> could get their hands on (assuming they don't have it) a Contax-style
>>>> full-frame chip...
>>>> 
>>> 
>>> 
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>> 
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> 
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