The GMC is the original Genus Matte Box. It has been discontinued andreplaced by the GWMC  wide angle matte box

Designed with the professional DV camera user in mind, this versatile product is a must have accessory for your camera. Built from high grade aluminium, stainless steel and acetal, this light but rugged matte box will provide you a high level of light control and allow you to use you video camera with a wide range of filters.

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