[photo-3d] Re: Quiz#2 - it's all in the film travel

["Bob Porter" <bporter3d@xxxxxxxxxxx>]

>As I see it, turning the camera
>upside down will only invert the image on the film.  Turning the
>chips back over will invert them back as if the camera had not been
>inverted in the first place.  To put it another way, inverting the
>camera does not invert the image, it only inverts the film.  Nothing
>changes in the image.

By Jupiter, I think the poor man is right!  The lens and film don't know
they are upside-down.  Two pictures from two place are the same. Cliff
pulled a fast one on the experts, I fear!  Now my head hurts, George.

Turning the camera upside-down changes the film travel direction from L-R to 
R-L. This is the difference.

- BP
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