HDSLR news shooter reviews the Letus LTMB1 Mattebox with its unique circular polarizer filter that allows you to control not only exposure but color temperature.
The Letus LTMB1 is part of the Shane Hurlbut Master Cinema Series and comes as part of the MCS ManCam Bundle, MCS ShoulderCam Bundle and MCS StudioCam Bundle. It can also be purchased separately.
More info on the Letus LTMB