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Astrophotographic terms


Canton, US
1111 posts

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gbowen Gold Member Nikonian since 31st Mar 2011
Fri 14-Sep-12 06:30 PM

I have heard a lot of unfamiliar terms tossed around in various forums dealing with astronomy and astrophotography. Is there a good website that explains what they mean in beginner's terms?

I'll ask a couple right here. What is Afocal and prime focus?