>If I have understood the patents correctly a Pentax doesn't need a cross
>sensor. A cross sensor is used for making the AF sensor sensitive for both
>horizontal and vertical lines. The MZ-S is sensitive to both vertical and
>horizontal lines. Practically speaking the MZ-S has six cross sensors. It
>works by mirrors. All sensors are divided into two segments. The mirror
>system invert the lines for one of the two segments. This means that
>regardless of the orientation of the original line one of the segments will
>get the orientation the sensor is sensitive for. Eg if you have a vertical
>line the sensor will see a vertical and a horizontal line. If you have a
>horizontal line the sensor will still see a horizontal and a vertical line.
>In other words the sensor don't need to be sensitive to both horizontal and
>vertical lines but only for one of them.
Very interesting idea. Assuming this was true, does the MZ-S the only Pentax
have this feature? What about other manufacturers?
regards,
Alan Chan
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