Looking through filters

[Andy Finney <andy@xxxxxxxxxxxxxxxx>]

Willem wrote ...

> The generic Rollei IR is made from Schott RG 695, ie 50% transmission
> at 695nm. It is also equal to #89B, and you should be able to look
> through it in bright sunlight....*can* you?

I don't want to be alarmist but I don't think looking through an IR filter
at a bright light is necessarily a good idea.  A lot of IR will get through
to your retina and your iris is likely to be wide open.  Whatever you do
.. resist the temptation to look at the sun.

Dr Doom


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Andy Finney: andy@xxxxxxxxxxxxxxxx

http://www.demon.co.uk/atsf/

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Topic No. 10