This dynamic duo, co-artistic directors of Lincoln Center's Chamber Music Society, has emerged as one of the most popular cello-piano combinations on today's musical scene. Friends of Music audiences have long admired Mr. Finckel's work as cellist of the Emerson String Quartet. He and Wu Han, his wife, will present a rare treat, an all Russian-program that includes works by Miaskovsky, Prokofiev, and Shostakovich.