"Bob Blakely" <[EMAIL PROTECTED]> wrote:
From: "Mark Erickson" <[EMAIL PROTECTED]>
It should be fairly clear from the figure at the bottom that light
striking the CCD perpendicular to the array gets focused on the sensor.
What is not shown is that light striking at an oblique angle will get
focused adjacent to the sensor, not on it.
This has to be baloney. Light *has* to strike the sensor at an oblique angle
or an image will not be formed! Only light along the axis of the lens will
be perpendicular to the array, and of this light, only the ray on axis will
be perpendicular. Of the rays forming a dot on the array along the lens
axis, even light from the edges of the aperture will be somewhat oblique.
Now, the question is:
What oblique angle is acceptable to the array?
This cannot be determined from the inaccurate cartoon provided.
All this hypothesizing on why full-frame sensors work poorly or not at all strikes me a pretty bizarre a year after Canon has proven than they work very well indeed. Rather like proving that bumblebees can't fly.
Full frame is not the issue here, there are ways to avoid those problems although not perfect. Canons shifted micro lenses represents one solution.
DagT
