mounting for projection

[P3D Richard Twichell <73163.3423@xxxxxxxxxxxxxx>]

Re:  the recent comments about cardboard mounts being unacceptable for NSA 
presentations:  The Brackett Dissolver has a rather firm registration 
system, which tends to distort cardboard mounts by squeezing them into an 
arc.  The latest batch of Dissolvers have a control on the bottom which 
allows regulation of the pressure.  It should be possible to show cardboard 
mounts with this model, but cardboard mounts are inherently dimensionally 
unstable and any variation in thickness or size will be magnified by the 
large screen and fast lenses used in NSA programs.  

I am in favor of the no-cardboard rule, although we "played it by ear" at 
Rochester and did not enforce it rigidly.  However, any show which is good 
enough to be presented at NSA is certainly good enough to be presented at 
other venues; therefore the question of whether or not it is "worth it to 
remount 150 slides 'just' for an NSA presentation" doesn't really arise.

The RBT projector is notoriously unforgiving for any but RBT mounts.    

Dick Twichell
Program Chmn, NSA-Rochester, '96


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End of PHOTO-3D Digest 1941
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