2" Wide Field Eyepieces
I've used and owned Panoptics, Naglers and XWs, but not those specific focal lengths. What are your specific objectives, though? On paper, at least, I like the 31mm Nagler on these, because it gives you a nearly identical true field of view as the Panoptic and XW, but with a touch more magnification. Might as well go for the little extra detail it gives you if the FOV is the same. Yes, you will get a little more distortion at the edge with the 82 degree field of a Nagler compared to a 68 or 70 degree like the Pan or the XW, but this has never been objectionable to me and I am very fussy . At the center of the field, I doubt you'd notice a difference on any of these.
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