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llanitedave
Humble Megalomaniac
Reged: 09/26/05
Posts: 10926
Loc: Amargosa Valley, NV, USA
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Re: Strange Results in Eyepiece FOV Comparisons
05/18/08 01:44 AM
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I don't think it's an artificial concept at all. It's a real characteristic of a specific eyepiece. When all distortions and aberrations are taken into account, the Hyperion 8mm will perform as a 76 degree eyepiece, and the UO Orthoscopic will perform as a 39 degree eyepiece.
Once that measurement is done, I can insert the eyepiece into a scope of a different focal length and predict what the true field will be.
Is that incorrect?
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"S.O.E." (Sauron's Other Eye) 16" Royce conical mirror: A permanent work in progress.
10" Homebuilt dob, old Coulter mirror
Next Project: The "Eye of Sauron" Observatory!
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