Kenko 82mm ND4 Real Pro Filter
For portrait shooting in over lighted conditions using cameras with shutter speed limitation less then 1/4000sec to achieve shallow depth of field and take advantage of fast prime lenses.
Kenko REALPRO ND neutral density filters.
ND filter decreases the amount of light entering the camera lens. This allows to shoot with wide open diaphragm even in shiny day to achieve shallow depth of field.