[photo-3d] RBT X3 measurments

["David W. Kesner" <drdave@xxxxxxxxxx>]

My friend and fellow list member Fritz Brown had his handy-
dandy calipers at work today so we measured my RBT X3A. Here 
is what we got:

Interlens spacing: 66.0mm
Film gate width: 32.7
Outside gate "reducer": 1.0mm
Inside gate "reducer": 2.1mm
Distance between film gates: 34.5mm
Distance from film gate to film gate: 67.2mm

Given these figures, can any of you math types calculate where 
the window is set?

Here is what you get on your film chips (unfortunately these 
were made at home with a ruler):

The progression is 1R, 2R, 1L, 2L, 3R, 4R, 3L, 4L, etc.

The spacing between the first and second is almost nothing, 
between the second and third is 1.0 to 1.5mm, between the 
third and forth is almost nothing, between the first set and 
second set is 4.0mm. The total from the start to end of each 
group is 133mm. With 32.7mm for each of four chips that is 
130.8mm, add to that the 1.5mm for the middle space and you 
are left with 0.7mm to split between the other two chips - so 
although they are close, they do not overlap. Most of the time 
there is a thin black line, but occasionally the images butt.

That's all for now,

David W. Kesner
Boise, Idaho, USA
drdave@xxxxxxxxxx

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