ARRI cameras record and output images in Log C wide gamut color space. Log C images can transport all the color information and high dynamic range captured by ARRI’s camera sensors. As our cameras evolve, so does Log C - with the introduction of ALEXA 35 we launched its newest update: LogC4.
Logarithmic encoding - "Cineon" style
Images encoded with Log C (C is for Cineon; the original Cineon log encoding is based on the density of color film negative) can be identified by their flat and desaturated nature. Whites and blacks are not extended to their maximum values. A LogC4 image looks different from a LogC3 image because of their different origins: the original ALEXA sensor and new ALEXA 35 sensor have a different dynamic range and therefore different demands towards a logarithmic encoding of their images.