Re: Stereo base in macro

[P3D John Bercovitz <bercov@xxxxxxxxxx>]

Jim C writes:
 
> John B. derived a fairly general equation a while back that
> specifies the stereobase as a function of the taking lens focal
> length & near & far distances in the scene, but I'm afraid I
> can't dig it up. John?
 
I'm afraid I might be ridden on a rail if I exhumed it yet again.  
I think probably Jamie was looking for a rule which is easy to 
apply even under field conditions.  Perhaps I should write up 
something for Photo-3D's anon ftp site.  
 
[...]
> these discussions of non-ortho situations 
> give John the heebie-jeebies 
[...]
 
And worse!   8-)
 
John B


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