P3D RE: 3-D show etiquette

["Ivester, Paul" <ivestep@xxxxxxxxxxx>]

> Phil Palmer writes:
> ...
> I mount all my slides in RBT mounts and use window 
> sizes from 16mm to 31.5mm.
> ...
> Is there any technical problem projecting a show with 
> mixed window sizes ?
> and even if it is technically OK 
> Does it breach 3D show etiquette ? 
> 
If all of your slides are in RBT mounts, you should have no 
problems.  Correct me if I'm wrong, but I understand that 
RBT mounts use the same center spacing for their 5 perf. 
mounts as for their 7 perf. mounts.  I believe that Steve 
Spicer's cardboard mounts also follow this rule.  The 
problem arises when these are mixed with American 5 perf. 
mounts.  These 5 perf. mounts have a slightly wider center 
spacing than the 7 perf. standard.  

What I do is to check each with the appropriate mounting 
gauge (from Reel 3D) for maximum infinity separation.  When 
projecting, I set the horizontal alignment to the American 
5 perf. window.  This prevents exceeding the maximum 
infinity separation.  The RBT windows will float slightly 
in front of the screen, but I don't find this as 
objectionable as exceeding infinity separation.  This would 
be less of an issue on a small screen.

Does anyone have any better suggestions?

Paul Ivester
Seattle, WA USA
mailto:ivestep@xxxxxxxxxxx


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