P3D Re: Hugo de Wijs VM viewer

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Abram Klooswyk did a fine job in explaining why the lenses should
be adjusted to the image and not to the observer.  I am in full
agreement with that.  My only concern is this statement:

>The View-Master system is probably one of the best in keeping
>far point separation at a standard value. Therefore VM viewers
>_don't need_ an adjustable interocular! 

Unfortunately, View-Master commercial or personal reels do not 
keep a standard far point separation.  There is significant
variation.  Anyone who has tried to project VM reels in a large
screen is usually aware of these variations.  Some of it might 
be due to the small size of the chips (harder to make small
adjustments).  This variation can be a problem when viewing the 
images at high magnification.  I have used other high-magnification
VM viewers without interocular adjustment and had hard time
fusing some (quite a few) images.

Therefore I will modify my original statement as follows:

Variable interocular adjustment in a relative higher magnification
VM viewer (like the Hugh de Wijs viewer) is a plus, given the
variation of infinity point separation found in VM reels.
Also, the large size and quality of the lenses makes viewing 
a pleasant experience for everyone, especially those with
narrow or wide interocular.

>George, as moderator of the FansOfHugoDeWijs list I must tell
>you that you will be out, if you spread any further confusion 
>on his viewers. 
    
Oh, oh!  I am in trouble again!  That's why I run my own
lists... Then no one can kick me out!!!

George Themelis, moderator (sole member too!) of the FansOfDrT list


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