Z125L , 2X Light starts with the same density as P124, but feathers the tobacco almost from the color edge and more gently graduates to clear. One stop of compensation.
Z125S , 8X Is the same density of color as P125M but the graduation extends to 3 4 of the filter. Requires 3 stops.
Z125F , 8X Full is the same as P125S except that the tobacco covers the entire filter. Requires 3 stops.