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You haven't said on what telescope your 25mm eyepiece has been so good.
For me, the most important factor is exit pupil. So that my 25mm eyepieces only really get used a lot in my f/12 Maksutovs, where they are always good. Whereas on my f/10 C8 I didn't use 25mm eyepieces much, as 20mm was better for faint stuff, and 30 or 40mm was better for lower power viewing. And I've only rarely used 25mm or 26mm in my f/4.5 dob.
Regards,
Renato
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