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Lots of good points. Thanks guys.
It may well be that the 219x I'll get with the 2.5x Powermate and 8.8mm Explore eyepiece is enough, so I'm not overly desperate about a 3mm eyepiece. A 7.5mm might work well with the Powermate to give 3mm equivalent, but there aren't many options, unless there are some older models I've forgotten?
The main criteria are a moderately wide field of view and reasonable eye relief.
Edit: on reflection a 2-4mm zoom might fit the bill, so might try a wanted ad for that too!
Last edited by MortonH; 03-04-2014 at 10:27 PM.
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