XCSOURCE&reg; 58mm Lens Hood + UV CPL FLD Filter Set for Canon 70D 60D 700D 650D 1100D 1000D 600D 50D 550D Nikon Panasonic Lumix D7100 D7000 D5200 D5100 D3200 D3100 D3000 D90 LF136 A UV filter is used to reduce UV rays from entering the lens and striking the film. A polarizer is different than most filters in that it is composed of two pieces of glass, mounted independently inside a round frame so that one can be rotated relative to the other. A FLD filter (fluorescent light correction) provides the perfect solution for obtaining pleasing skin tones and correct color while shooting without a flash under fluorescent lighting. With the Flower/ Crown/ Petal shape designed, it offers the same prevention of flare as the corresponding circular or rectangular design, but with a smaller size and a lighter weight.