• Emerald Green (A130 & A131) & Yellow (A132 & A133) graduated filters are designed to heavily contrast clouds or to bring the color of the sky into harmony with the dominant color of your subject.
A130 Emerald E1 requires one stop of compensation.
A131 Emerald E2 ia twice the color density of E1 and requires 2 stops.
A132 Yellow Y1 has the same density as E1 requiring 1 stop.
A133 Yellow Y2 is twice the color density of Y1; requires 2 stops.