Article ID : 00149587 / Last Modified : 02/09/2019

Why is only the left half of the histogram displayed when recording with S-Log2 or S-Log3?

    When recording a subject with a small luminance differential using S-Log, the histogram display as if it is compressed and the right side of the histogram is rarely displayed.

    S-Log2 and S-Log3 are gamma curves optimized under the assumption that grading will be performed in the post-production process. S-Log2 and S-Log3 let you record with a wide dynamic range. When recording with S-Log2 or S-Log3, the camera controls the exposure differently than usual to achieve this wide dynamic range.

    As a result, if you record a subject with a normal luminance differential, it is often recorded as a compressed signal roughly the size of the left half of the histogram (when recording a subject with a large luminance differential or recording with different exposure settings, the histogram may also appear on the right half).

    When recording with S-Log3, no luminance is distributed along the right edge of the histogram since the maximum luminance for S-Log3 is 94% in video output.

    • Histogram when recording with S-Log3

    • normalhist.png
    • Histogram when recording the same subject without S-Log

    • normalhist.png

    For details on S-Log, refer to the page below.
    Help Guide for Creators
    http://helpguide.sony.net/di/pp/v1/en/contents/TP0000909108.html

    NOTE: Help Guide for Creators is a Help Guide for more creative image production using a camera manufactured by Sony.