It has been stored without ever being used. Among the many soft filters, "DUTO" is particularly weak in its soft effect. It beautifully expresses the blur of highlights while keeping the core of the focus clear. Unlike regular soft filters that apply an effect overall, this filter creates a very subtle blur primarily in the highlight areas. This changes the texture of skin and hair where light hits, creating an effect as if veiled in a thin veil or emitting a soft glow from within. Due to its effect characteristics, it is recommended for use with medium telephoto lenses with a focal length (full-frame equivalent) of around 85-135mm, and at apertures from wide open to mid-aperture. Please note that using it with wide-angle lenses or stopping down too much may cause uneven or directional soft effects. Filter diameter: 77mm