Re: IR flash

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

> >> ive just made myself an IR flash by taping a wratten IR filter to a flash.
> >I would be VERY careful doing this.  When your flash goes off, the filter
> >will have to absorb pretty much most of the energy.  I have read of cases
> >where the gel bursts into flame when this is done.
> I bet.  At the very least the gel will probably melt on the flash head, or
> else severely reduce the lifespan of the head through increased thermal
> stress.

My personal experiences with this have not resulted in quite the catastrophic
results that are suggested above. The filter, after a few flashes, did aquire a
"dimpled" pattern - more or less a picture of the heat build up in the Wratten
87C filter material - but it did not melt nor burn nor fade.

regards,

Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
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