P3D Re: Re: A stupid (?) twin camera idea

[erker@xxxxxxxxxxxxxx (Greg Erker)]

>
>One partial work-around is to "overlap" the bodies, kind of like this:
>
>        +--+
>        |  |
>     +--+  +--+
>     |        |+--+
>     +--------+|  |
>            +--+  +--+
>            |        |
>            +--------+
>
>The problem here, of course, is that one lens is now further back than
>the other.  So, here's my stupid idea ... is it possible to put
>different focal length lenses on the cameras to give them,
>effectively, the same field of view?  For example, could one put a

  It's not the angle of view that's a problem but different
subject distances.

  If your shot only has objects that are very far
away then it will work fine, since one camera is 10 miles
from the mountain and the other is 10 miles plus 3 inches.
So it will work but there won't be much stereo :)

  For a subject 4 feet away, one camera is 48" and
the other is 51". So there will be a 6% difference in
image size. Not good unless you are shooting prints
and can correct one of them.

  A better idea might be a reverse beamsplitter. Have
the two cameras aimed towards each other and have two
45 degree mirrors in between. Kind of big and awkward though.

Greg



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