Archived posting to the Leica Users Group, 1999/05/31

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Subject: RE: [Leica] Which choice of Leica Pradovit projectors?
From: "Robert G. Stevens" <robsteve@istar.ca>
Date: Mon, 31 May 1999 09:55:58 -0300

Is this slide pop thing just a problem with european style projectors?  I
have never noticed a problem with Kodak Ektagraphic III's.  They do not
seem to produce much heat on the slide.  This may be why Leica has finally
gone to the high end Kodaks for ther new projectors.

Regards,

Robert

 At 07:23 AM 5/31/99 +0200, you wrote:

>The main frustration with my slide projections is the 'popping delay'. When 
>the projector is really hot (after 10 minutes or so), most slides pop early 
>enough (after less than 1.5 seconds), so that the phenomenon does not 
>bother the viewers too much. BUT some of them take longer, and sometimes 
>all of them take longer. Even weirder: sometimes they fail to pop 
>alltogether. I do not know why. Humidity rate ? Storage temperature (though 
>they remain at room temperature all year long) ? I've tried preheating the 
>slides with a hair dryer, but I have not noticed  more predictability.
>
>I find the CF does a great job on popped slides, even in plastic frames, 
>and although the lens curvature is supposed to have been computed for 
>Kodachrome cardboard frames.
>
>Alan
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