P3D Re: Mounting of Stereo Prints

[PgWhacker@xxxxxxx]

Paul,

     Your analysis is exactly correct.    
>
>> As far as the image being to close or to far from the window that
>> can be adjusted by moving the images apart or pushing them together.
>

      Althought it's commonly stated this way, the statement is 
ambiguous.  Read one way, it sounds like '..by moving the trimmed images 
in and out.'  That's wrong.  Read another way, it also sound like'.. by 
moving the images in and out before you trim them.'  That's right.

As you correctly point out below, it might better read, "...the window 
can be adjusted by moving the images apart or pushing them together IN A 
Q-VU MOUNT OR THE EQUIVALENT."   


>In a normal (surface mounted) stereo print how could this be?
>
>Given the layout of a stereo pair:
>   L              R
>   |----------|   |----------|
>   |          |   |          |
>   |O         |   | O        |
>   |          |   |          |
>   |          |   |          |
>   |----------|   |----------|
>
>As I understand it, the closest object, indicated by O above, would
>appear behind the window because the distance from O(L) to O(R) is
>greater than the spacing of the edges of the image (the distance from
>L to R).  To move the closest object closer to the window requires
>altering the stereo pair in such a way that the distance L~R is the
>same as the distance O(L)~O(R).  If the two prints are only moved closer
>together or farther apart, O(L)~O(R) will always remain greater L-R and
>the position of the image with respect to the window will not change.
>
>I can see how moving the prints closer together or farther apart will
>adjust the window if they are behind a mask (e.g., Q-Vu), but it
>doesn't seem to work for surface-mounted pairs.  What am I missing?

   When you slide Q-Vu prints together/apart you DON'T change the Q-Vu 
mount itself.  You DO change what's exposed in the picture.   It's not 
the *sliding* that changes the stereo window, it's the *change in the 
exposed part of the picture* that changes the stereo window. The 
equivalent action for surface mounted pairs, is to change where they are 
trimmed.



Cheers,

Greg









Greg Kane
Denver

PgWhacker@xxxxxxx



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