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Canon released updated software in March 2021 for the Canon EOS R5, R6, and 1Dx Mark III that includes a number of enhancements based on customer feedback. Canon offered me a few extra days to conduct some tests, but by the time you read this, everyone should be able to download firmware versions 1.3 and 1.4 for the R5 and R6 and 1Dx III from the Canon support websites.
With support for 1080 120p slow motion, C-Log 3 for better video grading, and the ability to save customised settings on a card for backup or loading onto another body, the EOS R5 gains the most from the changes. The R5 and 1Dx III both have a new lower bit-rate RAW mode, as well as the opportunity to
As you can see here, it can look great, but the high bit-rate necessitates CF Express cards, and not everyone needs 4k resolution or wants to waste resources storing and downsampling it. The original EOS R5 was one of the first cameras in its class to film 4k beyond 60p, in fact up to 120p for usable slow motion. I requested 120p at lower 1080 resolutions out-of-camera, and now that it’s available with firmware 1.3 for the R5, I’m happy to inform that the lower bit rate may now be recorded onto SD cards. In comparison to the far more realistic 327Mbit/s for 1080 100p, I measured the 4k 100p rate at 1572Mbit/s. My video is a collection of footage.
Next, I calculated the non-RAW rates for 8k All-i, conventional IPB, and the new IPB Light mode, coming in at 1188Mbit/s, 449Mbit/s, and 219Mbit/s, respectively. Although it is evident that lower bit rates would have an influence on moving objects when viewing them all side by side with a static item, there is no resolution loss.
When I switched to 4k HQ mode in the UHD format, I calculated that All-i had a bit rate of 444 Mbit/s, the standard IPB had a bit rate of 116 Mbit/s, and the new IPB Light had a bit rate of 59 Mbit/s. This may seem low for 4K, but it’s fine for mostly static subjects like interviews or pieces to camera when you’re trying to squeeze out a little extra storage. All three have the same resolving power when viewed side by side at high magnification on a static test chart, but lower rates will always be more affected by motion.
Those are the
