Thread: 150mm Verse 152mm refractor
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Old 03-10-2019, 09:31 PM
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ngcles
The Observologist

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Join Date: Dec 2006
Location: Billimari, NSW Central West
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Hi Bobby,

I'd think about 15% larger by surface area of the lens or mirror, so approximately therefore, about 165mm aperture before there is a genuine, apparent difference.

Best,

L.
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