Re: Making your own wratten 89 equivalent filter?

[George L Smyth <glsmyth@xxxxxxxxx>]

--- Magnus Slayde <magnus13@xxxxxxxxxx> wrote:
> 
> I remember reading awhile back that someone was saying that a certain 4x5
> film if exposed for a certain ammount of time then developed would make a
> good infra-red passing filter for light sources? I recently acquireda
> 10/20/30 Watt halogen video camera light with a hot shoe mount, I turned the
> mount around backwards so that it would fit my PENTAX super ME 35mm. Now I
> have this wild looking camera rig with a batery powered spot/flood attached
> to it, I wanted to get a filter so I would only pass infra-red for some
> night time wildlife shots using HIE, does anyone know how to make the
> makeshift filter?

You may be thinking about the use of E6.  You can read the article, "Making An
Improvised Infrared Transmitting Filter by Andrew Davidhazy," in the Infrared
articles portion of my Web site.

Cheers -

george

=====
Handmade Photographic Images
http://members.home.net/hmpi/

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