• An essential part in digital photography process for photographers or hobbyists. Wearable and washable, foldable and anti-deformation, Very .
• The grey side works for the exposure correction and white side for white balance setting.
• By placing a gray card in the scene to be photographed, oriented at a defined angle relative to the direction of the incident light, and taking a reading from it with a reflected light meter, the photographer can be assured of consistent exposures across.
• Gray cards can be used for in-camera white balance or post-processing white balance.
• Provide a standard reference object for exposure determination in photography.