Re: [OM] 3D (What worked, what didn't)

[DrT (George Themelis)]

> So with a shift-lens you could do a "hypostereo" replicating a mice or
> birdsview? (just so you can start thinking about the shift lenses :)

Yes and no :)

To take a hypostereo you need a close-focusing lens (like a macro lens) and 
a slide bar (the slide bar is almost a necessity in this case.  You put the 
camera on the slide bar, take the first picture, shift/slide the camera by a 
small amount, take the other picture.  The rule of thumb regarding the 
amount of shifting (also known as the "stereo base") is 1/30 the distance of 
the nearest object.

You do not need a shift lens, just a regular lens.  The camera is shifted by 
the required amount.

The shift lens is commonly used to "correct" perspective.  A stereo picture 
of a building taken with a shift lens, actually looks strange is 3d. 
Perspective is natural in 3d.  "Perspective correction" is unnatural.

George 

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