S-Log2 - Sony PXW-FS7 Quick Reference Manual

E. Advanced picture settings for Custom Mode
E2.4 S-Log2
You can use the S-log2 gamma curve in Custom Mode
to capture an extremely large scene brightness range
(14 stops or 1300%). This will result in a very flat on screen
image. The PXW-FS7 is primarily designed to use S-Log
recording in the Cine EI mode but the option is also
offered in Custom Mode to help deal with particularly
difficult lighting situations.
S-Log3: Like S-Log2 you can use the S-log3 gamma curve
in Custom Mode to capture an extremely large scene
brightness range (14 stops or 1300%). Note that the peak
recording level for S-log3 is 92%.
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