Bob Shell wrote:
Maybe I am missing something, but I would assume that a 1mm
displacement of the camera body would produce a 1mm shift in position
of the image on the sensor, regardless of lens focal length.
No unfortunately it's not that simple.
OK, so elaborate on why it isn't. Seems to me that it is that simple,
and the Minolta system proves it.
A 1mm shift of the camera will only produce a 1mm shift of the image on
the sensor if the lens is at 1:1 magnification. That's not true in the
general case. Lenses magnify. Different focal lengths magnify by
different amounts. This applies to image shifts just as it does to the
images themselves.
In fact I think the body would need to know the distance to the image as
well as the lens focal length in order to convert accelerations into
image shifts.
S
