Thanks Mark, that's quite a handy way of estimating size. I tend to do something similar, but I can only feel confident with a couple of my eyepieces as I keep forgetting what the TFOV is with the others. a little table would be a very good idea and could sit in the cover of one of my books.
I laugh when I read of your difficulty in deciphering some of your recorded observations - I experience this quite often when trying to transcribe a few days later and wonder what on earth I was rabbiting on about.
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