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Re: Re: IR receivers - plasma filters?
On 13 Jan 2009, at 21:33, Keith Doxey wrote:
> Unexposed Photographic film negatives are also supposed to be quite
> good as
> IR filters.
That's going to be tricky unless you have your telly in a darkroom :-)
The link talks about unexposed, developed /slide/ film (which will
remain opaque to visible light).
It's probably easier to use fully exposed, developed negative film
though (there's usually some on the end of the roll when you get a
35mm film back form being developed!)
Jim
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