1) They are used to match with cameras 2) Beautiful design and refined work Graduated color filters provide a gradual color transition for a smooth blending effect. Give your landscape and skin texture a more colorful touch. Perfect for changing the mood of a picture.Fits any camera lens with a 52mm filter thread.This filter is mounted on a rotating frame to allow the user to bring the colored and clear filter portions into the desired position by simply rotating the mount.This filter is double threaded allowing additional filters to be screwed one over the other. Using two color graduated filters rotated 180 degrees relative to each other allows different colors to fade into each other.High quality metal and glass construction. Extremely solid and lightweight. No wobbling or cross-threading.Color filters are one of the least expensive and most effective ways to dramatically improve your shots.

 

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Gradual Gray filter