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Old 09-19-2007, 05:03 AM   #7
ereszet
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From paper to Sony - part 5

Cradle distance and angles

First picture to the left is a setup with camera lens at 90 degrees to the book page placed in the v-cradle.

The middle picture shows that moving the v-cradle closer to the lens helps to maintain 90 degrees angle for pages of bigger sizes. The zoom in the camera has to be adjusted accordingly.

The last picture shows what happens when the distance between the cradle and the lens stays the same despite a bigger page size. The distances between upper and lower parts of the page and the lens differ considerably, which causes a trapezoidal effect.

Not shown in the pictures but an obvious solution for bigger pages is to change the lens angle in order to keep the focus in the middle of the page. But when the lens angle changes then it is no longer 90 degrees to the page. That is why you can change the inclination of v-cradle panels.
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