These long focal length eyepieces you guys are mentioning 56mm meade 55mm TV, 50mm tak etc etc will not work in the C9.25 because of the small port, they will vignette. John G mentioned the 35mm panoptic and I know that works fine, I have my doubts about the 41mm panoptic working properly also. I would go with the 35mm Panoptic.
CS-John B
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