It's Friday, the traditional time where we at ProLost sit back with a glass of tawny port and reverse-engineer camera transfer functions. Join us, won't you? Today's subject, RED Log.
RED Log is one of the options available in RED Alert (or the at-your-own-risk RED Cine). It's a logarithmic transfer function that appears to be designed to map the camera's linear-light image to a DI-friendly tonal range.
Like Panalog, the RED Log transfer function can be matched using the Cineon log/lin tools available in common compositing applications.
Here are the correct settings in After Effects (set to display pixel values in decimal):
And in Nuke: