COKIN CREATIVE - Center spot WA Blue Filter - Medium Size (P series)
Center Spot filters enhance the subject while isolating it within a lightly blurred border.
Conserves the clarity of the main subject at the same as diffusing the surroundings, for focal length between 21mm and 35mm, to accentuate the effect use a short focal length and close the diaphragm. Center-spot larger than 060. For a surround coloured in blue