Paralenz needs no color filters.
Recordings made underwater are tinted green or blue, unless you use lights or a color filter.
Color filters must manually be put in front of the camera at the right depth, and changed as you go deeper to get the right results. Furthermore, a color filter absorbs light leaving you with darker and noisier recordings.
Paralenz instead has DCC™ (Depth Color Correction) Using the pressure sensor, the DCC™ corrects the colors according to the depth you are at, it is equivalent to changing color filter every 10 cm. / 4 inches.
You get the benefit of a color filter without the loss of light and the hassle of changing filters. It is the first camera in the world that automatically gives you all the colors without a color filter.
Read more in the DCC guide