Use a label maker to label the settings of the Paracorr 1-5. Then, evaluate which setting of the Paracorr best corrects the edge of the field of each eyepiece. Start with the out-most setting, focus and look at the edge. Move the Paracorr in one setting, refocus, and compare the edge with the last image. There will be one setting that results in the best correction for that eyepiece.
Use your label maker to put a number on the side of the eyepiece for the appropriate Paracorr setting.
Then, when you're in the field, just match Paracorr number with eyepiece number--no memory or chart necessary.
I note that my eyepieces use all 5 of the Paracorr settings.
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