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That is a very technical question.
Our eyes receive light at a certain speed (like a camera shutter) but our eyes are not fast enough to see the colour of deep space light unless you go very big aperture.
It's not as simple as I have made it sound but that is it in a simple way.
To understand the use of filters go to the '2" Filters' thread in this section and see the web link.
Last edited by ballaratdragons; 08-02-2005 at 04:20 PM.
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