Red China MB840C MatteBoxes filter box can hold about two block 2 or 4 * 4 * 4 5.65 filter the light blade MB840C MatteBoxes ALEXA and RED ONE can be used, such as digital cinema or HD video camera, and a green net films the carriage can be adjusted up and down by gradually sliding sheet of filter picture composition in the proportion of the first group have a fixed, the second group is rotatable. In order to facilitate a more flexible shooting was taken to replace the lens side open design, taking into account the repetitive use, and strengthen connections open side toughness and firmness. PL polarized lenses for focusing up lap general routine can also try to get wide cohesion 5.2mm lens Canon ultra-wide angle lens, when the lens side shines into the lens will produce lens flare is reduced contrast gray screen will cause the color difference especially when you appear on the face or other objects is not very good, with light barrier at the top of the blade, adjustable high and low amplitude is produced must shoot camera accessory, for easy carrying with a special shipping box. Some minor problems Hua MB840C red one-year warranty, the country's major cities have relevant technical staff to help solve the problem, even if the extent of damage to be returned for a shorter period it takes to ensure that the use is in use.