Andoer 40.5mm Digital Slim CPL Circular Polarizer Polarizing Glass Filter for Canon Nikon Sony DSLR Camera Lens Increases color and contrast by removing unwanted reflections from non-metallic surfaces such as water or glass. Reduce glare and reflections significantly from non-metallic surfaces by using the CPL filter. This Slim Frame filter is providing both-side thread, so you can attach other accessories on it such as your lens cap. Foliage is richer, skies bluer. Fits for 40.5mm screw lens.