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Re: [ATM] Focal reducers
Basically, the FOV sort of determines the amount of coma. This
isn't the strict rule but that is what happens. If you throw a
2x barlow onto a telescope, the FOV will be 1/2 of what it was
and thus the coma aberration will be 1/2 of what it was.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net
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