Used Flashpoint Matte Box System II for 15mm Rod Follow Focus Rig 5D3 DV 4x4 Rotatable Filter

Designed to prevent lens flare and glare from natural and artificial light sources, the Flashpoint Matte Box offers everything you need to get started whether you're shooting with a digital video camera or a DSLR. This lightweight but sturdy device is equipped with dual ABS plastic filter frames and stages and can accommodate filters 4 x 4" and 4 x 4.5" filters. One filter stage can be rotated 360 degrees when shooting with circular polarizing or gradient filters; the other is fixed. Both filter frames can be locked in position but are easily removed.

Three donuts are bundled with the Matte Box. Constructed from thick and durable neoprene, the donuts fit snugly against the Matte Box's 100mm back mount opening. Inside circumferences measure 48mm, 64mm and 74mm to accommodate a wide range of lenses for all your shooting needs.

The removable coated aluminum French flag and two side doors attach securely via bayonet mount and thumb screws. The blades are easily adjusted-even while looking through the viewfinder for the most precise placement-and can be folded flat for storage or protection of the lens during transport.