S-Log is a gamma curve with a wide dynamic range optimised under the assumption that grading will be performed in the post-production process.
S-Log3 allows for better reproduction of gradation characteristics in shadows and the mid-tone range than S-Log2. It has characteristics closer to those of scanned film. S-Log3 is recommended in general. If S-Log3 does not offer sufficient gradation in the mid to high-luminance range, try S-Log2.
When using S-Log, we recommend checking the image quality including grading in advance by test-shooting.
IMPORTANT: When grading videos recorded with S-Log, technical knowledge is required.