EMDE & Spicer

[P3D emdesher <emdesher@xxxxxxxxxxxxxxxxxxxx>]

On Fri, 5 Sep 1997, P3D David W. Kesner wrote:

> In photo-3d 2268 Paul Talbot writes:
> 
> >I wonder if either the Spicer mounts or the EMDE binders have
> >changed specs ever so slightly?  I have very recent examples of both, 
> >and my Spicer cardboard mounts do not fit in the EMDE binder without
> >forcing them.  The cardboard mount is too tall, by a smidgen, before even
> >using tape to seal the mount shut.  After forcing the cardboard mount in
> >to the binder, the front and back sides of the mount bulge apart, the
> >binder bends slightly in the same direction, and the top and bottom
> >edges of the binder slant such that they are no longer perpendicular
> >to the side edges.  Thus the mounted slide will not stand exactly
> >vertical.  Do your Spicer mounts fit better than this in your EMDE
> >binders?

<snip>

> I should also mention that the glass was new stock from
> Reel 3D. 

<snip>
 
> If by "smidgen" you mean an amount equal to the thickness of the
> aluminum binder, then yes the Spicers are too tall (they are exactly
> the same size as the EMDE Binders). I make sure the glass is to the
> front (seamless side) of the binder and the mount is to the back. It
> is a tight fit, but I do not have to force anything and I have not
> noticed any bowing. I have checked this in both a TDC 116 projector
> and a Themelized Red Button viewer and can not detect any focus
> problems and I believe I am pretty critical.
 
<snip> 
  
  After rereading the original post and the reply, I now see that there's 
  move involved then whether or not the spec's for the EMDE binder or the 
  Spicer has changed.  They have not; the problem is that they are slightly 
  incompatible.  In the design of the EMDE mount, the finished mask is 
  inserted either into a frame or a binder.  It's the external dimensions 
  of these compondents that conforms to the ASA standard.  As a result, 
  the EMDE standard for cover glass allows for a slight vertical undersizing, 
  in order to compensate for the thickness of the binder's aluminum foil.
  When I first offered binders in 1994, I soon received a number of 
  complaints that the cover glass wouldn't fit into the binder.  In every 
  case, the problem was that they were attempting to reuse old glass from 
  the 50's (which varys widely in dimensions, i.e. Stereo Realist glass) 
  or "Plain Wrap" glass from Reel 3D which is NOT cut to EMDE's requirements.
  Starkman has agreed to stop advertising that it does.  So, the moral of the
  story is using Ford parts on your Chevy might work, but you probably will 
  have to do some modifications to get it to work.
  Dennis Sherwood   emdesher@xxxxxxxxxxxx


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