OPTRONTEC revenue for the last year amounted to 232.10 B KRW, the most of which — 231.71 B KRW — came from its highest performing source at the moment, Optical Filter, the year earlier bringing 135.77 B KRW. The greatest contribution to the revenue figure was made by Vietnam — last year it brought OPTRONTEC 181.90 B KRW, and the year before that — 119.80 B KRW.