| Camera Profiles |
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| Written by Sean McCormack | |||||||
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The most forlorn and forgotten panel in the Develop Module has to be Camera Calibration. It’s almost an intimidating part of the program, and left alone for the most part. Still it contains probably the singlemost powerful tool in the Lightroom development pipeline: the profile. A little history before we delve into this useful tool. In order to convert a Raw file into a common image format (like JPEG), we need to pass through a Raw converter. Obviously as Lightroom users, this is what we use, but it could also be Camera Raw, Digital Photo Pro, Capture NX, or a host of other manufactuer/3rd party products. These all have their own colour tone and look. In the case of Lightroom and Camera Raw, this look initially came from the ACR Profile. Back in the lab, Thomas Knoll used a special colour chart to create photographs shot under both fixed daylight and tungsten conditions. Sensors operate different under different lighting conditions, which is why the two illuminants are necessary. The resultant information was combined to create an ACR Profile (which appears as ACR2.4 for example). As you change the colour temperature of the Raw, the information from both the tungsten and the daylight calibrations are mixed to give you accurate colour. If the profile was revisited, and additional ACR Profiles are available to the Raw (e.g. ACR4.4). Please Log In or Sign Up for a FREE Silver Account to access the rest of this article or others on ProPhotoResource.com | |||||||
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