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A 20mm eyepiece gives a 2mm exit pupil in your telescope, and a 32m eyepiece gives a 3.2mm exit pupil. There isn't really anything useful for eyepieces delivering a 2.5 or 2.6mm exit pupil to do.
My C8 came with a 26mm eyepiece, and I used it till I got a 20mm eyepiece and then hardly ever used it again in that telescope.
Regards,
Renato
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