P3D RE: Sources for viewer diffuser material

[Stephen Puckett <spuckett@xxxxxxxxxxxx>]

I have used tracing material ('vellum'?) for quilters.  It is 
inexpensive and can be found at fabric and craft stores.  It is  
flexible and can be easily cut with scissors - but may be too 
flexible for your application.  

For my MF3D viewer I went to my friendly neighborhood plastic 
shop and had non-flexible lighting diffuser plexiglass cut to 
size for about $1.  There is little 'grain' so may be a better
choice when used close to the slide (ie. within focus).    


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