Frank,
I went for the 12mm Nag 4 instead of the 13mm due to the 1.25" and 2" barrel (fits both my scopes). Found it a wonderful eyepiece, used it every time the scope was out.
Then I made a big mistake (read as expensive) and bought a 10mm Ethos, now the 12 mm sits in the case a lot more often than before.
So to overcome the problem, I've ordered a 17mm Nag, so now I will be happy again, although a little bit poorer.
Rod
