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Did you notice any difference in brightness (transmission) from center to edge? I am guessing there is some gradient in coatings from center to edge. It's just my wild guess.
I may be totally off base

Recently, I compared very good wide AFOV eyepiece to excellent planetary eyepiece in light scatter and contrast. I saw Venus something similar to the first sketch (stock diagonal one) in very good wide AFOV eyepiece.

Tammy

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Tamiji,

I did not see any differences in brightness anywhere in the FOV. Venus moved around quite bit as I can't accurately polar align when its still light outside.

Thanks,

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S.R.

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