P3D Re: RE:Inerocular adjustment

[Steve Berezin <sbere@xxxxxxxxxxxxx>]

George Themelis wrote:
> 
> Thank you!  I cannot fuse the infinity points with this viewer.
> I suspected that the lenses are too close together.  Thank you
> for confirming this and for pointing attention to the problem
> and cause.
> 


I measured both the Viewmaster Model L which most people can fuse and
the ViewMaster Virtual Viewer which many people cannot and found their
interocular was Virtually ;-) identical. I did find the infinity
separation of the images was a tad greater than the interocular in both
the viewers.  That is why I assume focal length plays a roll in this. It
must have something to do with the angle that an eye has to move
accommodate the differences.  Obviously a longer focal length will
decrease the angle and decrease eye discomfort.  I have found this to be
true in many viewer systems that are fixed focus.

 
> George Themelis
> 
> =====
> George Themelis, DrT-3d@xxxxxxx
> http://home.att.net/~drt-3d/
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Steve Berezin
Berezin Stereo Photography Products
21686 Abedul
Mission Viejo, CA 92691
USA