Dobrý den. U zboží je napsáno "Nabízí až 140× zvětšení". Prosím Vás, jak to dosáhnout, pokud okuláry jsou K20 mm (20x) a K6 mm (67x)? S použitím Barlowove čočka 3x20=60 a 3x67=201. Tak co tím pádem znamená parametr zvětšení 140x? Děkuji.
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