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I bought the 8mm and 13mm Ethos (including a 2.00 Dioptrx for my astigmatism and wearing eye glasses) eyepieces when they were first released here in Australia and found them to be extremely sharp however trying to look around the 100 degree AFOV was off putting. I eventually replaced them with the a set of Type IV's with focal lengths of 12mm, 17mm, 22mm and 26mm and have found them much more suited.
If you can, try out out the many and varied eyepieces before you buy at star nights if possible, it is certainly a cheaper option.
The 31mm Nagler is a great eyepiece for wide field viewing in my opinion.
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