T3D Re: Focal length

[Tom Deering <tmd@xxxxxxxxxxx>]

>Maofd assumes you will then view the image with a 145 mm lens or sit the
>equivalent distance from the screen when viewing a projected image.  If
>you don't do this, you won't have an ortho image and I make no guarantees.
>That's why they call me "Orthoman".  8-)  I always try to have the same
>viewing and taking perspectives unless there is some desired special effect.

I forgot about the "taking" length equals the "viewing" length part.  I'll
have to look at the formula to see how I might jigger it to work when the
taking and viewing focal lengths are not the same.

I am worried about projection.

Tom



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