Thread: Mars 20th nov. 12.5"+good Ol' toUcam
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Old 21-11-2005, 03:55 PM
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iceman (Mike)
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Join Date: Sep 2004
Location: Gosford, NSW, Australia
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asi, it's focal LENGTH that determines image scale.. focal RATIO is related to the brightness.

Your 12.5" newt is 1800mm FL, whereas your refractor is what, 800?

That's why it's bigger.

Great pics too, you're getting the hang of that webcam!
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