![]() (No Longer Available) Digital GrayCapTM Many gray cards are not well-suited for digital photography. They often are not really neutral, and were designed for use with film as exposure guides, not as a gray balance source. The simple Digital GrayCapTM solves these problems as a sturdy plastic card with a spectrally flat color response.
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The GrayCapTM card has many advantages:
Instructions for Use of Gray Caps The Digital Gray Cap provides you a method of “encoding” the actual color balance of the scene by photographing the card and then processing it in a RAW editor like Adobe Camera RAW. It is processed simply using the White Balance Eye Dropper to click on the Gray Cap within your image. The software will automatically neutralize the area to equal values of red, green and blue, making the gray cap spectrally gray, and therefore your scene neutrally rendered. |
LAB Values of Neutral Gray Sources for Field Work (a and b values should be as close to zero as possible) MacBeth Color Checker (or ColorChecker Passport) SJ Photo Gray Cap WhiBal Card Note: The Digital GrayCapTM is designed for digital photography gray balance only. It is not an 18% reflectance card designed for use with light meters to determine exposure. It is also not as light as some prefer, but we have found it works very well with Adobe Camera RAW white balance tool. |
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