The filter thread size of Panasonic Lumix G Vario 45-200mm F4-5.6 II Power OIS is 52mm.
Below are links to the filters that we recommend you to consider for your Panasonic 45-200mm F4-5.6 II Power OIS:
Read our detailed Panasonic Lumix G Vario 45-200mm F4-5.6 II Power OIS Review