I tried Joe's 17mmNagT4 in my scope on the weekend, and it was a beautiful eyepiece. Sharp all the way to the edge, virtually no FC, generous eye relief and easy to use.
It's a winner if you're looking for something in that focal length.
However as I said in another thread, the 24mm panoptic is also a wonderful (small and light) 1.25" eyepiece, very sharp.
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