Would shining a light through a lens onto a bit of paper placed the same
distance away from the lens as the sensor is, work?
David
Moose wrote:
> Chuck Norcutt wrote:
>
>
>>Check pages 9 and 10 of the following 4/3 system PDF
>><http://www.four-thirds.com/pdf/FourThirdsSystem.pdf>
>>
>>Note the emphasis on the mount diameter being twice the image circle.
>>Also, do not be confused by the statement "This gives wide adaptability
>>among a variety of image sensors". This may sound like Olympus could
>>release a different size sensor (and they could) but since the 4/3
>>standard defines the size of the image circle the only freedom they have
>>is changing the shape of the rectangle or making the sensor square.
>>They must stay constrained to the defined image circle size.
>>
>>
>
> Do we have any source which allows us to really know what the image
> circle of the DiZeta lenses is? We know the diagonal of the sensors, and
> generally assume that is the limit of lens coverage. In theory, Oly
> could have designed them all for a slightly larger diagonal for future
> flexibility. The current sensor is a 22.5 mm diagonal. A 4/3 ratio,
> 15x20 mm sensor would have a 25 mm diagonal.
>
> In keeping with the recent thread, an 8x10 format sensor of 16x20 mm
> would have a 25.6 mm diagonal.
>
> Not saying it is true, just that we wouldnt know if Oly didn't tell.
>
> Moose
>
>
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