Kinda liked the below explanation of terms. The CV 125/2.5 Apo-Lanthar
shows some CA in in the foreground OOF area if there is a sharp edge of
contrast at 1:1 esp if on the Mirex T-S adapter.
Perhaps this is a special OOF CA. APO clearly does not = NO CA
under all conditions.
http://toothwalker.org/optics/chromatic.html
An Aberrant Mike
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