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Originally Posted by iceman
For the last 2 months or so, i've had on loan a Tak LE 7.5mm (thanks Louie!) which I've been using as my planetary eyepiece. I find it very comfortable to use, 10mm ER, 52° AFOV, sharp to about 90% and good contrast. They could be picked up for under AU$200.
At the last Kulnura meet, I had a brief chance to try John B's 7mm UO HD Ortho, and compare it to the Tak LE. The Tak LE was slightly more comfortable to use, thanks to the larger eye lens and longer eye relief. But I don't wear glasses so the Ortho was still easy enough for me.
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Hi Mike, I have and use both the Tak LE 7.5mm and the UO 7mm HD ortho and have compared them many times - I use them in F10 and F12 scopes. Both are excellent for planetary. I don't wear glasses but find the eye-relief of the 7mm at the limit of my tolerance - certainly don't think I could abide the 5mm HD ortho. The Tak LE 7.5 is magic and I'd have to give the edge for view and comfort, but I doubt you'll buy them for $200 unless you go second hand. Even with the good Yen exchange rate they're running closer to $300.
I find I can reasonably often (say 1 in 3 viewing sessions) push magnification usefully to 300x when viewing the planets and think you need this sort of mag to get the best possible views and detail when seeing allows. Not sure what this would require in your scope, but the Tak LE's have smaller FL ocular's than the 7.5 that maintain reasonable eye relief. Hope that's of some use.
cheers.