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Re: superslide

  • From: John Bercovitz <bercov@xxxxxxxxxxx>
  • Subject: Re: superslide
  • Date: Fri, 4 Dec 1998 11:50:57 -0800 (PST)
What a 35 mm projector will do:
          _____
         |     |     ________
         |     |    |        |
         |     |    |        |
         |     |    |________|
         |_____|

Either way it's 24 x 36 so diagonal is 43.3.
Superimposed:
          _____
        _|_____|_    
       | |     | |  
       | |     | |   
       |_|_____|_|   
         |_____|


Superslide:

        _________
       |         |  
       |         |  
       |         |   
       |         |   
       |_________|

37x37 has a diagonal of 52.3
40x40has a diagonal of 56.6

Either of these superslide sizes requires 
a lot more of the projection lens (or viewing 
lens if that's what you are using) than the 
standard 35 m slide does.  Only the exterior 
dimensions of the slide mount are truly 
compatible.  

Which leads me to my question: Are superslides
noticeaby softer in the corners when projected 
or viewed than 35 mm slides?  (Provided you are 
not using a $$$$$ Zeiss or Schneider or Leitz 
shiftable projection lens.)

Thanks,
John