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This will bring a raft of opinions, and I'll kick it off with mine.
I have the Denkmeier Standards, bought about 4 years ago perhaps. Love them for lunar and solar use, mixed feelings with DSO's.
For solar I usually use them in my Zeiss AS63/840 Telementor. Gorgeous views.
Luunar is normally with the 10" f5 newt. Only eyepieces I have at present for them are a pair of old and not too pretty Celestron 20mm Erfles. Perfect.
It has been said that bino-viewers are kind to older and less flash eyepieces, and maybe there is some truth in this.
Depending on what scope(s) you are thinking to use one in, you may need an optical system to bring the focus point out. In my case with the newt I have the 2" OCS made by Denkmeier. I can also use this with a 2" diagonal and this is how I use it with the refractor. The 2" OCS gives either 1.3x or 3x magnification, and if I want any more I simply use the 2.5x or 5x Powermates (you could use any barlow).
Good luck, try a few first, as I know a couple of observing friends who either can't "merge" the views, or plain can't use one.
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