How to use setting circles on a small telescope (and why they don't work!)

Описание к видео How to use setting circles on a small telescope (and why they don't work!)

The awkward truth about the effectiveness of setting circles fitted to small telescopes.
Erratum: The scale of the AA road map referred to is in fact 1:50,000 and not 1:500. So what's another 49,500 between friends? RJD

Presented by Robert J Dalby

for The Astronomy and Nature Centre

Produced by DB Video Services for Astronomy and Nature TV

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