Introduction FoneMate™ can connect with any Dioptrx™-compatible eyepiece and phones from about 60-mm x 114-mm (width x height) to 120-mm x 212-mm in size. Note that some eyepieces require an adapter to be Dioptrx™-compatible. See the Eyepiece Specification page at for a complete list of Dioptrx™-compatible eyepieces. Delos and DeLite eyepieces, with their sliding, locking, eyeguards work particularly well in this application.

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