Light in Photography - LIGHTING - FLASH LIGHTING -

Studio Flash Lighting - ACCESSORIES - Gobo's or Shadow Boards

There seems to be no reason why they are called Gobo's, but shadow boards are simply a device, like a card, painted black to absorb light and are used to deflect light away from areas of the subject, the studio environment or the lens of the camera the photographer does not want light to reach. If a board with some flexibility like a thin sheet of polystyrene foam is used it can be bent to direct the light in the manner the photographer desires.

Want to learn more? - do a workshop or one on one with Lloyd Godman