Re: Double depth

[T3D john bercovitz <bercov@xxxxxxxxxxx>]

I wrote:
>> So if double depth isn't a problem, where does this limit to 
>> the amount of a depth in a scene come from?
 
Bob Aldridge wrote:
> Surely it came from PROJECTION.
 
That's sure my suspicion.  So what is the real physiological(?) 
limit?  I did some experiments a while back.  With infinity in the 
scene, I shot scenes with near object at 2 m, 1 m, and 0,5 m.  I 
thought 2 and 1 were eminently viewable but not the last one.  
However, I also figured that maybe I was peculiar in this (among 
many other) respect.  Now it looks like maybe the maximum parallax 
rule shouldn't be 1/30 of the focal length of the camera.  Maybe 
it should be 1/15 of the focal length.  Of course this would cause 
projection problems so you couldn't do this to any pair that might 
be projected.  However, this still leaves medium format, Holmes, 
and large format views open for including more parallax.
 
John B


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End of TECH3D Digest 34
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