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[OM] Re: 4:3 ratio

Subject: [OM] Re: 4:3 ratio
From: "Ian Nichols" <ian.a.nichols@xxxxxxxxx>
Date: Sun, 17 Jun 2007 11:03:27 +0100
On 17/06/07, chucknorcutt@xxxxxxxxxxxxxxxx
<chucknorcutt@xxxxxxxxxxxxxxxx> wrote:

> My recollection from the introduction of the 4/3 system is that the 4/3 
> system does not dictate the aspect ratio of the sensor.  It only specifies 
> the size of the image circle which just happens to be the diagonal of the 
> E-1's sensor.  Anybody who wanted to could make a square format 4/3 camera if 
> they so desired as long as the image circle stays the same.  It just occurred 
> to me, however, that has big implications for the size of the mirror and 
> could conceiveably introduce clearance problems.  Maybe square 4/3 sensors 
> live only in alternate universes.

Shouldn't do, after all, the mirrors in the E-300 and E-330 pivot on
the short side and don't have clearance problems.  A square format
would have sides shorter than the long side of 4:3 or it wouldn't fit
in the same circle.

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