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Meade 4000 MA 12mm Astrometric Eyepiece


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Any users of this eyepiece?

Specifically, I am interested in knowing the approximate length of the "Linear Diameter Scale" (in arcminutes) in relation to any specific focal length. With these figure I would be able to determine the approximate length for my scopes.

Yes, I know the manual gives me a method of measuring it myself once I have the eyepiece, but I am hoping to get a "ballpark figure" (based on actual data rather than a "guestimate") before parting with £73.

Thanks.

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