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In my old 12" dob I used the following set. 24mm Panoptic, 13mm t6 Nagler, 7mm t6 Nagler.
Tried others such as a 6mm Delos and a 10mm Ethos. Easily the best combo was the 13 and the 24. At a 1500mm FL in the scope they gave 63x and 115x which is just about perfect. The 24mm Pan is nice and inexpensive and gives simply superb views, good eye relief at 15mm, pin sharp to the edge and lightweight. A 4.8mm exit pupil in that scope is pretty much ideal IMHO
The 1
13mm t6 Nag is pushing the power a little in a 12" f5 but if conditions are reasonable it gave good views with great contrast. Eye relief is a little tighter at 12mm but still OK.
Overall I spent many hours just using those 2 EPs with probably the 24 in te scope 80% of the time and the 13 most of the rest.
The 6mm Delos was really pushing the power and despite the eye relief it wasn't really comfortable to use with such a small exit pupil. 7mm Nag was similar without the added eye relief and while the 10mm Ethos was lovely conditions rarely warranted pushing to 150X
My recommendation is just get 2 at most 3 good eps. You can add others for other scopes or specialized tasks but observing is much more fun if you are not constantly changing EPs and concentrating on th view instead.
Malcolm
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