Specifications: Mattebox with french flag (for all digital dv camcorder/camera) Available adapter dia:58mm,62mm,67mm,72mm,77mm, and 82mm A matte box is a camera or camcorder accessory that essentially does the same thing as a lens hood and also mounts in front of the lens, but usually includes adjustable fins called french flag. Another purpose is to hold square filters in place in front of the lens. Sunshade/filterholder features a non-reflective retangular shade that allows for single or dual filter applications. Inbuilt square filter holder Another purpose of a matte box is to hold square filters in place in front of the lens. The filterholder takes 4x4 glass/plastic filters and has the ability to utilize two at a time.4 x 4 filters are inserted without the need of a filter tray French flag is very easily installed by sliding in the hotshoe and then screwing up. These can be moved and adjusted to reduce lens glare.