Interested in a quick dynamic range test of the new Canon EOS R5 8K external ProRes RAW recording mode of the Canon EOS R5 using an Atomos Ninja V+? And as a bonus, results for the new Canon Log 3 mode are thrown into this article as well. So please take a seat and read on …

This is not one of our typical lab tests as the Canon EOS R5 has already received our extended lab test treatment, which you can read up on here. Back then internal 12 bit Canon 8K RAW as well as internal 10 bit 8K Canon Log (H265) recording was already possible.

In the meanwhile, firmware updates have brought Canon Log 3 to the Canon EOS R5 as well as external 8K ProRes RAW recording via HDMI (in 10 bit) using the new Atomos Ninja V+. Enough reasons to quickly retest the dynamic range with those new offerings.

Dynamic range of external ProRes RAW 8K recording

In case you are not familiar with how we test dynamic range of cameras, have a look here.

A quick word on handling the 8K ProRes RAW files in postproduction: on an 8K timeline in PremierePro our NVIDIA GeForce RTX3090 graphics card which is on loan from NVIDIA (thank you) had no issues handling the files, GPU memory hovered around 10-12 GB, the load around 16%. As soon as you start to add noise reduction, memory usage and load start to skyrocket – which is to be expected. Mainly due to the GPU memory, I recommend the RTX3090 card if you plan to finish in 8K.

The Canon EOS R5 connected to the Atomos Ninja V+. Image credit: CineD

Plugging the Canon EOS R5 via HDMI into the Atomos Ninja V+, the camera is immediately recognized. Interestingly enough, Canon Log 2 is displayed as the Gamma – we will use that later in PremierePro to bring RAW into a log space for further analysis.

Camera information as displayed by the Atomos Ninja V+. Image credit: CineD

On the camera itself, the lowest ISO value that can be selected is ISO800 if the output is set to “HDMI RAW”. This is interesting, as the internal RAW recording has ISO400 as the lowest ISO. ISO400 is also the lowest ISO value for internal H265 Canon Log recording. For Canon Log 3 the minimum ISO value jumps up to 800.

So far so good. Developing the ProRes RAW files on an 8224×4336 (17:9) timeline in P