the PMW-320 camcorder comes equipped with optical ND (Neutral Density) filters and electrical CC (Colour Correction) filters. The optical ND filters are controlled via a built-in ND filter wheel -- Clear, 1/4ND, 1/16ND, and 1/64ND. And with the electrical CC filters, users can easily obtain the desired colour temperature by setting the mode – 3200K/4300K/5600K/6300K – on a camcorder-assignable switch. Users can select the four values cyclically, or choose one preset value. This is also available via an assignable switch. This is useful when a sudden change occurs during shooting, and a quick and direct setting is required.