Re: Mounting to window vs. infinity

[P3D John Bercovitz <bercov@xxxxxxxxxxx>]

Dr. T writes:

> My stongest objection to infinity mounting is that most of my slides  
> do not have a real infinity. 

Then there's no problem.  The problem arises when people want to cram
a little more depth into a scene by moving infinity a little farther
apart (and they don't want to lose image to a closeup mask).  This is 
fine since most people can take more depth than the mask allows.  But 
it plays havoc with unadjusted projection.  No problem in the viewer for 
many people since their eyes are much further apart than infinity spacing 
anyway.  If a person wants more depth in a projected view than the mask 
allows, perhaps he should consider cutting the inter-aperture distance.

> One argument for mounting to infinity is that by varying the infinity 
> separation the eyes "get tired" while shifting convergence to view the 
> infinity. 

I don't know if I get "tired" from this but I do get annoyed if it 
happens in an otherwise flawless show.  If it's not a flawless show, 
there are worse problems to worry about.  8-)

John B


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