[James Nguyen]

You have to use a antireflective coated filter. Not all filters are made equal.

These are some of the best I have used. Many other brands do not have a seal between the glass and the metal rim, so dust and water gets in.

I like the Hoya HD’s https://www.amazon.com/Hoya-Hardened-8-layer-Multi-Coated-Digital/dp/B001G7PMNQ

The hoya’s are nearly unscratchable, and from what they advertise, extremely difficult to break. They also have some of the best antireflective coatings I have seen. (better than coatings on my nikon pro lenses) so they do not cause any flare in situations where the lens would normally not flare.

B+W filters are very nice as well, but they are more expensive, and the coatings are slightly better at reducing glare on the hoya.