This firmware upgrade for EOS 5D Mark IV features a log gamma setting that maximizes dynamic range and provides a wide exposure latitude. Canon Log makes it perfect to shoot in tricky lighting conditions where there are high contrasts between bright and dark areas, as it reduces the chance of important details missed out by over / under-exposure.
The files produced using Canon Log are ideal for post-production processes where corrections, colour matching and grading are applied and provides users with a high level of creative freedom without substantially degrading the image quality. This great added feature will certainly satisfy the photographers/videographers who were looking around for extra video capability.
Image Quality with Canon Log
• When Canon Log is set, horizontal noise stripes may appear in movies depending on subject or shooting conditions. It is recommended to shoot a few test movies and check before the actual shooting. Note that noise may become more noticeable especially when you apply strong contrast during colour grading of the shot movie.
• Horizontal noise stripes tend to appear when the subject is dark and flat or [Peripheral illumin.] is set to [Enable]. This noise may also appear when ISO speed is relatively low, such as at ISO 400.
• When the noise is noticeable, it is recommended to set [Peripheral illumin.] to [Disable], shoot in brighter exposure, and perform brightness adjustment during colour grading. Also, noise may be decreased when you shoot at ISO speed lower than ISO 400 (even though the dynamic range will be narrowed).