Re: New Slip-in Mount

[P3D emdesher <emdesher@xxxxxxxxxxxxxxxxxxxx>]

On Sat, 8 Mar 1997, P3D Dr. George A. Themelis wrote: 

snip

> >From the flyer that came with it, I copy:
> 
> 
> Reel 3-D is the first to point out that the design limitations of the
> slip-in do not offer the precision of aluminum or plastic stereo mounts
> for this format.  For many, however, the cost, and ease of use will make
> this a desirable mount, especially for slides that will mainly be viewed
> in a hand viewer.
>
 
Cost effective?  $14.95 divided by 50 equals 29.90 cents each, and the 
quantity
price of $239.95 divided by 1,000 costs almost 24 cents each.  Remember this 
is for a paper mount, so it still seems expensive for what you are getting.
How well does this mount do when projected, since it does not conform to 
the standard 1/8 inch mount thickness all classic 1950's projector were 
designed for?  Can it be mounted in glass, if someone wanted to protect it?
Or is this mount meant only for viewer use?

> The mount consists of three glued together layers of cardboard:  First the
> smooth front layer, which has the 23x28 apertures in it.  Second, the
> middle layer, which has a pocket that it is a fraction larger than the
> height of the film and it is about 32 mm wide to allow for adjustment of
> European stereo camrea film and require less trimming of full-frame 25mm
> film chips.  Finally, there is the back layer, which contains the slide
> insertion slots.  The apertures on the back layer are about 0.5 mm larger
> than on the apertures on the smooth front layer.  This is so that the 
> alignment of the front and back layers are not so critical - the window
> is always formed by the smooth front layer.  Therefore the smooth front
> slide is always the side to view from.
> 

So, there is only about plus or minus 4mm of horizontal film adjustment, 
right?
(28mm final aperture with 32mm internal aperture)  How do you fix the 
film in place, so it won't later shift out of place?
How easy (hard?) is it to mantipulate the film into proper position in 
the pocket, since you can not directly see what you are doing?
How tight are the tolerances in forming the aperture?
 
> -- George Themelis
> 

Curious enough to send for a sample! :-)
Dennis Sherwood  emdesher@xxxxxxxxxxxx


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