Archived posting to the Leica Users Group, 2008/05/08

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Subject: [Leica] Leica R-10 at Photokina 2008
From: red735i at earthlink.net (Frank Filippone)
Date: Thu May 8 08:35:58 2008
References: <380-22008548145637911@M2W035.mail2web.com>

Big Image Circles....... Teles are easy to make big... wides are hard.....

Makes you wonder..... how much bigger than 24x36?  25x37?

For those trying to figure image circle for a given aspect ratio.... draw it
out.... you will see that within a circle, a square is the largest (
reasonable) aspect ratio you could use with most efficiency.   A rectangle
is the worst... especially one with a big difference from height to width.
( unless you use a circular sensor.. pure bolderdash)

I am still thinking the Hasselblad sensor..... used by Imacon-Hasselblad on
their V line...... It is 36.7mm square.... 16MP... and the SW is already
available.... 
Note: does not meet the 20MP expectation..... 

Frank Filippone
red735i@earthlink.net

Logically you are correct, however there may have been other purposes in
mind when the lenses were designed that never saw the light of day.  Among
older Telyts, the 400mm f/5 and 280mm f/4.8 will cover 6x6.  I've also seen
a 400mm f/6.8 adapted to 645 (I think) but I don't know how the performance
is at the edges.  More often I'll see the 280mm f/4.8 adapted to 645, 6x6
or even 6x7.

Doug Herr




In reply to: Message from wildlightphoto at earthlink.net (wildlightphoto@earthlink.net) ([Leica] Leica R-10 at Photokina 2008)