Superb lens steal at this price
All of my lenses are muddy to varying degrees, but the UV filter (almost throwaway item, compared to lens price) is an absolutely must-have - all the time, regardless of terrain.
I had a 62mm CPL from my old Canon 650 and tried it but the drop on light was ridiculous. Ordered a Hoya UV filter to stick on when in hazardous terrain and will probably use the hood the rest of the time.
Proper hot. I have three of the Oly Pro lens range and they are excellent - excellent engineering, light, weather-proof and fast as f*ck. UV filter is a must. Work out what ND and CPL are for before splashing out.
Filters are a love or loath item. Purists will ridicule you and the sensible folk will back you up. CPL will instantly lose you some light. Kind of ruining the faster aperture gain in doors. The ND, same again. If you want protection get a ‘UV’ filter. Yes performance may suffer but not as much as a damaged lens. I like the Hoya HD range, pretty easy to clean.