Hello guys! In the last post I presented to you what Dynamic Range is, and continuing in this series of posts on image capture, I’ll talk about capturing images with the Gamma Log Curve.
Come on, what’s this story of capturing images in Gamma Log Curve? Only one detail for those who do not know what a Gamma Curve, is electronic adjustment process of the sensitivity curve of the video signal read from the image sensors (CCD or CMOS). Its function is to encode the intensity of luminosity in the image obtained by the camera in order to match the way the human eye, obtaining a better overall result of the images.
When we capture the image of a video with the Gamma Curve in Log, we will extract an image with in all its dynamic range and color space, generating an image with colors, brightness and contrasts well washed, but enabling various corrections and obtaining multiple looks of the same image. through color correction and color grading. I’ll drill down on the advantages of capturing images using gamma log curve:
Let’s go to the advantages of capturing the images using the Gamma Log Curve. It is a gamma curve designed to record and transmit as much information recorded by the camera sensor as possible. By recording an image in Gamma Log Curve, you preserve the wide color gamut and dynamic range recorded by the sensor. Then, in post-production, you create the image you want as part of the color grading process, with greater artistic control over the final product.
The wide area of tones captured by the Gamma Log Curve makes it especially efficient when capturing objects that tend to lose detail in shadows (low lights) or exhibit exaggerations in highlights (high lights). Scenes that were impossible to be filmed before, such as those with bright sunlight and dark shadows, can be captured in much more detail. Also Read :Camera bag: 9 things under 20 Euro that should be put in the photo bag
The material captured with the Gamma Log Curve is recorded in a much larger color space. That is, the larger the color gamut, the more color information can be recorded and the more vibrant and realistic the images will be.
By capturing log images, you capture much more information than normal-standard footage (REC.709). The Log range gives you much more control over the final image in post-production. You can instead of adjusting the exposure to highlights or shadows while shooting, you can capture all this information and then choose how you want to display it.
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Various manufacturers like Sony, Panasonic, Nikon, Canon, FujiFilm, etc… already make available in some of their camera models both photographic and video the option to capture images with gamma curve. Some examples:
Sony – S-Log
Panasonic – V-Log
Canon – C-Log
FujiFilm – F-Log
Nikon – N-Log