Distributions of conversion depth for a zero color object in the HSC CCDs. The y distribution is much flatter and leads to a globally reduced BF effect. Changing the color of the object by about the width of the our z−y distribution does not significantly alter the expected depth distribution in the y band. For the z band, most of the conversions occur at small depths, where the perturbating electric field is small. For the i2 band, the average conversion depth is about 10 µm.