Hello All,
Here's a short test I did:
This is a short and not very scientific test I did exporting the footage from Mlrawviewer in different log spaces to see how well they would look and grade and to see how wide of a range of usable Log spaces I could get from the 5D mark III footage.
All footage was shot with 5D Mark III in raw with a Canon 50mm f/1.4 lens at 1920x1080 resolution. Footage was opened in Mlrawviewer 1.3.4 on a Mac and exported in four different log spaces in this order: C-Log, Log-C, S-Log, S-Log2.
The files were exported as ProRes 4444. In Davinci Resolve Lite 11 I applied different LUTs from the excellent VisionColor Impulz package which were matched for the type of footage. For example, the C-Log footage had a C-Log version LUT of the Impulz emulsion, Log-C had a Log-C version of the LUT etc. Every shot received the same LUT and I have not changed the footage in any way except for applying a LUT. The LUTs have changed between different shots but for the same shot I used the same LUT matching the Log space of the clip.
I cannot remember the exact LUT I applied but it doesn't matter that much as I made sure I'm applying the same LUT for every clip in order to be able to compare the footage. The only thing changed, as I mentioned, is I matched the type of LUT to type of Log footage.
Some additional details:
First shot was shot under tungsten light at 800 ISO at f/1.4.
Second to fourth shots were shot at 100 ISO at f-stops between 16 and 22.
The last two shots were shot using a daylight coming from behind the camera at ISO 400 with f-stop around 4 but I'm not sure about that one.
Apart from Log-C not really being suitable for the 5D footage except for only the brightest of conditions I think all other log spaces are usable, with C-Log being clearly the best match for this camera.
I'd love to hear your opinion.
Goran