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Is Dall-Kirkham Coma Visually Less Perceptible Than In A Comparable Newtonian?

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Posted by Sandro Chemello/">Sandro Chemello on August 23, 1998 12:45:31 UTC

I am considering building a Dall-Kirkham cassegrain.I have heard that an f/12 Dall-kirkaham would have coma equivalent to a f/5 newtonian. My question is; would the coma in the Dall-Kirkham be less visually perceptible because at f/12 the larger Airy-disk would mask a greater portion of the coma than the smaller Airy-disk in the f/5 Newtonian?

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