Re: IR flash

[John Horna <jhorna@xxxxxxxxxxxxxx>]

Hey Gang,

correct me if I'm wrong (and I'm sure someone will), but Sunpack makes (or made) an
infrared head for the 522 flash, which I'm putting off buying.  I've used a Vivitar
283 flash on auto setting with just a #25 filter over the lens and got decent
results (Kodak B&W 35mm IR film).  The negs were a little dense, but very
printable.

On Galveston Island, John

ADavidhazy wrote:

> > >> 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
>

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