Douglas grey card
£15.00
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This Douglas plain, flat grey card may sound like a mad accessory to buy, but it’s a really good item to have in your camera bag.
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The grey card is used to get accurate metering from your camera, as it allows the camera’s own exposure systems to measure the available light on a neutral surface. Simply hold the card in front of the camera to take an exposure reading and then manually set the camera to that exposure. This example is made from durable synthetic material that can be washed clean and easily stored in your camera bag. It folds in half, which makes it easier to carry around at all times, so you can get accurate exposures no matter where you are.
www.photo-software.com/greycard