Originally posted by skeevy420
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No, I ended up with three Pentax XW eyepieces which I'm very happy with: 40mm, 10mm, and 3.5mm. These are good focal lengths for my 120mm Orion EON. Your telescope being slower than mine, I think more or less any eyepiece would work well in it, and the choice comes down to comfort factors based on the geometry of your face, whether you use glasses to observe, etc. I like my Pentaxes precisely because they're so comfortable; I can move up eyecup up or down to reach the perfect height for glasses-on or glasses-off viewing. One thing I'll mention is that where I live, on most nights the seeing isn't good enough for the 3.5mm to show more than a 10mm barlowed to 5mm or even alone. I might suggest the same for you -- that the 10mm providing 203x magnification in your telescope will be more useful most of the time than a 7mm providing 290x. But maybe you live in Florida where the seeing is consistently excellent and that advice doesn't make sense!
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