The Coronado Cemax eyepieces are supposed to be enhanced and matched to the their series of scopes and I have been happy with the 18mm. Tele Vue Radians work very well in the 12mm to 18mm range however in my opinion you try as many EP's as you can until you are comfortable with. One eyepiece I used the most was a 15mm TV Panoptic but for some inexplicable reason I sold it
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Cheers, Steve