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Bryan
I have three telescopes of different types and can only say that over the last few days the 'seeing' has been rotten through all of them regardless of EP. I live in the Wollongong area and there's just too much rubbish up there at the moment. Even at or near zenith, it's not pretty up there so be patient; the good viewing will come.
As far as your 10" LX90 goes, the TV 11 mm should yield good planetary views once the weather cleans up. In suburban skies though, you're up at 227X and that's starting to push it a bit. The 147X that the 17 mm will give you might well be the more agreeable view, albeit smaller.
At Cloudy Nights there is a good report on planetary EPs so look it up in the Eyepiece Report section.
Is your LX new with GPS? If so, how are you finding it.
Mark.
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