Archived posting to the Leica Users Group, 2004/02/08

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Re: Digital M - was Leica to Restructure, Cut Staff
From: Marc Attinasi <attinasi@mac.com>
Date: Sun, 8 Feb 2004 21:10:28 -0800
References: <20040208131826.GG2784@panix.com> <022501c3edb2$a5758590$6501a8c0@CCA4A5EF37E11E> <200402080539.VAA04340@mejac.palo-alto.ca.us> <20040208131826.GG2784@panix.com> <5.1.1.6.2.20040208120824.042e58e8@mail.brick.org>

It is not the size of the chip that is the problem, it is dealing with 
a rear lens element that is incredibly close to the sensor, and that 
sends in light rays at extremely oblique angles. As I understand it, 
and I am not an expert but an avid hobbiest who has read a lot about 
this stuff, the current digital sensors all require the light to come 
at the sensor as straight as possible - in other words, close to 
perpendicular to the sensor plane. Check out the lens designs of the 
new E-1, for example; they strive to make the light strike the sensor 
straight-on. Visualizer the actual sensor sitting at the bottom of a 
small pit - if the light comes in a too much of an angle then not 
enough hits the sensor itself because the pit blocks it...

M cameras have the rear lens element very close to the film plane, and 
the wide angle lenses have to send the light to the film plane at very 
oblique angles to get full-frame coverage. Film does not care what 
angle the light some in at, digital sensors do. At least, that is the 
current state of the technology. As I said before, I hope that Leica 
can 'fix' this sensor limitation so we can get bigger sensors in our 
mini point and shoot digital cameras too. We'll have to see,

Cheers!
- - marc

On Feb 8, 2004, at 12:12 PM, JCB wrote:

> At 06:46 AM 2/8/2004 -0800, Marc Attinasi wrote:
>
>> I'm still not convinced that the sensor required for a full-frame 
>> M-digital can be produced at all, and I'm less confident that Leica 
>> can produce it. They are an optics specialist, not a computer and 
>> electronics specialist. Hopefully they will pick their partners well 
>> - a digital camera that works as well as the M system would go a long 
>> way toward making me a digital-convert!
>
>
> Leica's partners for the R digital back are Kodak and Imacion. The 
> best of the best. Since they already deeply in bed with these 
> companies, who currently make 22MP full frame 645 sensors, why would a 
> 24x36mm sensor be so difficult?
>
> JB
>
> --
> To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html
>

- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

In reply to: Message from Rei Shinozuka <shino@panix.com> (Re: [Leica] Digital M - was Leica to Restructure, Cut Staff)
Message from "B. D. Colen" <bdcolen@earthlink.net> (RE: [Leica] Digital M - was Leica to Restructure, Cut Staff)
Message from "Jim Shulman" <jshul@comcast.net> (RE: [Leica] Digital M - was Leica to Restructure, Cut Staff)
Message from Rei Shinozuka <shino@panix.com> (Re: [Leica] Digital M - was Leica to Restructure, Cut Staff)
Message from JCB <jcb@visualimpressions.com> ([Leica] Re: Digital M - was Leica to Restructure, Cut Staff)