Opus Orchestra celebrates its coming of age with concerts in Hamilton (20 July at 8 pm in the Gallagher Concert Chamebr), Tauranga (21 July, 7.30 pm) and Rotorua (22 July, 3 pm Civic Theatre). Diedre Irons is soloist in Beethoven’s Piano Concerto No. 5 (“The Emperor”). Peter will conduct Beethoven’s Fifth Symphony and a new piece by Andrew Buchanan-Smart, who founded the orchestra in 1991.