"Set of Filters Special for macro photography which includes 1 of each – Close Up + 1, + and close-up + 4 close-up filter, which can be used alone or combined to obtain the desired effect. A close-up filter is a magnifying glass that creates the optical effect of reducing the focal length of the camera. The depth of field is limited, so it is recommended to use the shortest possible opening. With multi-coated Hoya HMC, recognized by the capacity of reducing the reflections in the filter's surface, thereby reducing flare and ghosting. With a light transmission media of more than 97%, the HMC filters offer a sharp contrast and an excellent colour balance.