You can absolutely use any filters that you choose with the use of a bayonet filter adapter _ step. (bayonet on one side, threads on the other). You can add step up rings to the adapter for flexibility in filter choices. I like the B+W and Heliopan filters. I personally don't like covering the zeiss glass with inferior filters, much less anything at all. But I'm a big fan of neutral densities of varying strengths and a red for contrast where needed. Select what's right for you and enjoy!