If you simply use a blue filter to emphasize blue, the entire photo will have a blue cast. Blue Hander mainly makes blue more vivid and increases saturation. It is suitable for emphasizing the blue of lightly cloudy skies and oceans. /[82mm Blue Hander]82mm Blue HanderIf you simply use a blue filter to emphasize blue, the entire photo will have a blue cast. Blue Hander mainly makes blue more vivid and increases saturation. It is suitable for emphasizing the blue of lightly cloudy skies and oceans. □