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Is this true
" Whereas the TV76 has a 76mm full APO objective, the Pronto is a 70mm achromat. Read that again. No, it’s not a “semi-APO”, it’s an achromat! From what I have read (by a certain person who almost certainly knows), TeleVue used a cheap ED glass in the objective which has little or no effect on correction for chromatic aberration, but did allow them to use the letters “ED” when marketing it!"
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