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Re: (meteorobs) RED LIGHT
-----Original Message-----
From: Robert Gardner <rendrag@earthlinkdot net>
To: meteorobs@jovian.com <meteorobs@jovian.com>
Date: Tuesday, September 12, 2000 5:10 PM
Subject: Re: (meteorobs) RED LIGHT
>According to a recent article in a little known magazine called "The
Practical
>Observer" red may not be the optimum color for the filter to prevent the
>destruction of your night vision. It could be green for some individuals.
It
>suggested that you illuminate a print of the complete visible spectrum with
a
>light which can be dimmed with crossed polaroid filters. Reduce the
>illumination till the last color disappears. That last color is the filter
for
>you. I've heard from other sources that it is the brightness that counts
and
>not the color. I continue to use a red filter most of the time but am
annoyed
>by the green hue that I see when I look back at the sky. I hope that some
more
>knowledged person gives some answers to your question. But I thought I
would
>throw my two bits in.
>
>Mike Maurer wrote:
>
>> I am looking for advice on red filters for flashlights. Do you generaly
buy
>> gels from theater suppliers? Or make due with any piece of red plastic
etc.
>> Is there an optimal color of "red" to use.
>> Thanx
>> Mike
>>
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