Gray card

Gray cards can be used for in-camera white balance or post-processing white balance. Many digital cameras have a custom white balance feature. A photo of the gray card is taken and used to set white balace for a sequence of photos.

For this reason, many photographers make use of a standard gray card instead. When you think about it, it makes perfect sense. It has a nice, medium tone and a neutral hue, and photographers frequently have one anyway for metering.

Gray Cards To test and calibrate your meter, choose a bright, sunny day, about two hours after sunrise and two hours before sunset. Place the 18% gray card or any other medium-tone object, such as your medium gray camera bag, outdoors.

Gray Cards Since the exposure system is designed to set the exposure to capture a middle gray scene, you can get perfect exposures by using a gray card.

GRAY CARD - Also known as the "Kodak neutral test card," a gray card is an 8" X 10" (20 cm by 25.5 cm) card, about 1/8" thick, that is uniformly gray on one side.

Gray card A card that reflects a known percentage of the light falling on it. Often has a gray side reflecting 18 percent and a white side reflecting 90 percent of the light.

Gray Card Balanced in RAW Converter VS. Custom White Balance with Expo Disc WhiBal Gray Card - white balanced in Capture One white refrigerator = 232R-234R-235B 3 points blue ...

Gray Card - Gray cardboard that is used to establish the base-line exposure reading when using reflecting-light meters. - H - Hair Light - A small light used to emphasize a particular part of the subject/object being photographed.

Gray Card A Matte 18% reflectance card used instead of a subject for a Reflected Light Meter reading. Tips: Exposure corrections for unusually light or dark subjects are the same as for an ILM - not an RLM.

Gray card - card with an 18 percent gray tint (reflectance) used to determine exposure by taking a meter reading from subject light reflected by the card.

Grey/gray card. A piece of cardboard coloured a medium grey. This precisely determined shade of grey represents 18% grey in light intensity, or zone V on the zone system. Such grey cards can be useful for metering reflected light.

Figure 2: Gray Card To perform a custom white balance, both images are opened in the Photoshop. The images are arranged in a way that both can be seen (see Figure 3). Figure 3: Both Images Opened in the Image Editing Program ...

Set up a large gray card outdoors in the sun on a clear enough day so that the sun won't be dipping in and out of the clouds every three minutes. A full 32x40 sheet of some kind of medium gray mat board is perfect.

Theoretically, if you take a reflected-exposure meter reading from an 18-percent gray card and expose your film according to the reading, the result should be a picture that matches the tone of the gray card exactly; however, ...

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There's also a Custom setting to manually set color balance based on a white or gray card. Exposure Compensation increases or decreases the overall exposure, from -2 to +2 exposure equivalents (EV) in one-third-step increments.

(Custom white balance uses an 18% gray card as a neutral reference.) A digital camera's auto white balance is often more effective when the photo contains at least one white or bright colorless element.

The F5, F100, and D1/X/H all have an 18% "gray card" gray shutter. This is for the Monitor Pre-Flash, which is really the first part of the flash exposure calculation. OTF, or "off-the-film," is the second crucial part of TTL flash exposure.

By pointing the camera at a white or gray card (angled so that it is reflecting light from the room) as a neutral reference, filling the screen completely with it, then pressing the White Balance button (or set it in the menu), ...

Alternatively employing a gray card (18% gray piece of card) in the meter's field of view will make exposure a more predictable exercise.

All cameras used manual white balance measured from a gray card All cameras exposure compensation was set to produce the same image histogram* All other image parameters (sharpening etc.) were set to normal (neutral setting) ...

The correct exposure value can also be read off a neutral test card or 18 percent gray card (or even the palm of the human hand) held in front of the subject.

set the white balance to a setting measured from an image of the gray card shot in the beginning of the photo session fine-tune exposure adjust tone (contrast, midtones and gamma, apply curves) apply minor selective color enhancements ...

In the One Touch setting, you can point the camera at a neutral gray card or sheet of white paper under the light source you want to use, and can capture the best possible White Balance setting. This can then be saved in the camera for future use.

-Reflector - any substance from which light can be reflected. It also describes a white or gray card used to reflect from a main light source into shadow areas.

You don't want to meter the subject, or that would bring out more detail. Try to find a midtone area, such as the moderate shadows, or use a gray card, which is a simple piece of cardstock that has average "reflectivity." ...

See also: Gray, Light, Card, Photograph, Camera