Re: IR Flash

[Joshua_Putnam <josh@xxxxxxxxxxxx>]

Bill Baker <wab@xxxxxxxx> writes:

>Subject: Re: IR flash

>>> 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.

I haven't used an actual gelatine filter on a flash, but before I
got an IR head for my Sunpak strobe, I used a Lee polyester 87
taped over my Olympus T-32 flash.  It never caught on fire or
melted, but if I took several shots in rapid succesion it would
get warm to the touch and start to deform.  When I stopped using
it, it had developed a crinkled area in the center of the foil,
in line with the flash tube, but was still working quite well.

-- 

 Josh@xxxxxxxxxxxx  is  Joshua Putnam / P.O. Box 13220 / Burton, WA 98013
                       "My other bike is a car."                   
                     http://www.wolfenet.com/~josh/
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