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Thanks for the review!
You'll get by far the biggest improvement across the field with your low power eypieces at the edge of which which is where the strongest coma is.
I note that most of your testing was with a 7mm eyepiece on an F5 scope. You've noted a perceptable improvement in star sharpness a extra stars visible, which is what was predicted, given that Coma gets worse from centre to edge in a linear function, In good seeing all eyepieces views should experience an improvement, no matter how big or small the field.
Mark
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