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I was researching eyepieces when I settled on a Meade 6.7mm UWA 5000 Series. It should be arriving tomorrow. However, when I checked my order, I saw that it was for a 4.7mm. Will this work? I have read that the ETX-125 can go to 500x but most suggest 250x max. What should I do, send it back before opening it?

Anyone used this combination that can advise???

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IMHO even 6.7mm is ridiculous, x250 is a real struggle with a 125mm scope, x160 is a more realistic estimate of what is a "useful" high magnification (given perfect optics & seeing).

The 4.7mm will "work" in the sense that it will fit in the eyepiece holder tube & produce an image, however it will be mushy well past the point that I would consider unbearable, this is due to diffraction i.e. an aperture related effect not due to optical design or construction of either scope or eyepiece.

A 4.7mm EP may be useful as a high power with a f/5 or possibly f/6 scope.

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