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The Parfocal Ring

It is extremely useful to have the LPI camera and a telescope eyepiece be parfocal—it will save you time when

you need to refocus.

Parfocal means setting two or more eyepieces to the same focus. (In this case, one eyepiece is a camera.) In

other words, if you focus one eyepiece in your telescope, then you remove it and replace it with a parfocal

eyepiece, the parfocal eyepiece will require little, if any, refocusing.

The following procedure will show you how to make your LPI camera parfocal with a low-power wide-field 25mm

or 26mm eyepiece (do not perform this procedure with a high-power eyepiece). Use the supplied parfocal ring

and perform the procedure during the daytime.

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Meade LPI Bedienerhandbuch Seite 14