The filter thread size of Panasonic Leica DG Elmarit 200mm F2.8 Power OIS is 77mm.
Below are links to the filters that we recommend you to consider for your Panasonic Leica DG Elmarit 200mm F2.8 Power OIS:
Read our detailed Panasonic Leica DG Elmarit 200mm F2.8 Power OIS Review