[Leica] LHSA meeting in Wetzlar; Leica Camera AG

[red735i at earthlink.net (Frank Filippone)]

Wonderful report, thanks Seth....  Glad to see the gnomes are more happy 
with their employment future.....

Let me focus on one issue,,, the lens coding.....

Seth said.... ",  because of 
the oblique angle at which light rays from shorter focal length lenses reach 
the sensor, Leica has placed before the sensor a device that adjusts the 
rays to reduce or elminate that effect. The code on older lenses tells the 
camera what adjustment is indicated for that focal length. I have been told 
that this is more important for lenses under 50mm, that the deleterious 
effect at 50mm is not too great and at the longer focal lengths, the lenses 
probably do not really need the coding."...

What this implies is that Leica has  provided a variable doo jiggey to 
CHANGE the adjustment ( of oblique angle rays) from 21mm to
50mm for example.  The lens provides the code to tell the camera what 
adjustment is required.

This could be done in one of 2 ways..... physically through a changing 
optical device, or through SW where an algorithm is employed
to change the value of the bits based upon the lens coding and placement of 
the bit on the sensor.  We used to call this
pre-distortion.

I'll bet on a SW solution.....


Frank Filippone
red735i@earthlink.net