A few seconds later, the writing on the gray card began to fade.

The values in brackets are the corresponding grey card readings.

A photo of the gray card is taken and used to set white balance for a sequence of photos.

To calibrate light meters, whether in a camera or hand held, the 18% gray card was conceived.

For the casual user, a gray card is unnecessary.

A major use of gray cards is to provide a standard reference object for exposure determination in photography.

Gray cards are made of a variety of materials including plastic, paper, and foam.

A gray card is only useful for setting or correcting the balance of neutral colors.

Many serious photographers or hobbyists consider gray cards an essential part of the digital photography process.

A photographic gray card gives you instantaneous, precise exposure readings in reflected light.

Now it is found that tbe bees fly to the red and gray cards indiscriminately.

He thrust himself back from the desk, chin on his chest, st balefully at the pale gray card.

Two recent cases involving grey cards have been referred to the European Court of Justice.

The pen poised above the gray card.

To simulate an average scene, a substitute measurement sometimes is made of a neutral test card, or gray card.

This update also introduced the "Grey Card", which contains misleading instructions that are not to be followed.

It had thick grey card covers.

Another option on some cameras is a button which one may press when the camera is pointed at a gray card or other neutral object.

Then you'll need to check the reflectance of your palm against that of an 18 percent gray card, the standard measure of an "average" subject.

With the new stuff, you tend to forget about filter factors and hyperfocal settings and using your hand as a gray card."

Gray cards can be used for in-camera white balance or post-processing white balance.

Gray cards specially made to be spectrally flat are therefore more suitable to the purpose than surfaces that happen to be available.

"Send Fritz a gray card.

There is a significant variation in the grey card readings, most probably due to variation in the intensity of the illumination.

(Of course taking photographs with side lighting or back lighting implies that the gray card should be oriented toward the camera instead.)