The Haida NanoPro Mist Black 1/4 filter works best with strong highlights. It creates a nice diffuse glow around the highlights. The stronger the highlights, the more obvious the effect becomes. The haze isn’t affecting the sharpness, though. Shooting wild orchids during sunset clearly showed the hazy effect, like there is a thin mist over the landscape.If there are no highlights in the frame, the effect of the Black Mist becomes less obvious and you might want to remove the filter on those occasions. Unless the hazy effect is something you like, of course. In a way, the filter acts as a sort of live Orton Effect.