Canon EOS C400 6K Camera with CN-E 45-135mm T2.4 Zoom Lens (Canon RF)

Canon has not announced compatibility with the EVF-70 EVF as of this moment. Currently the EVF-V70 connects by a UN-5 or UN-10 interface cable, the same as the LM-V1 and LM-V2 LCD monitors used with previous Cinema EOS cameras, and the EOS C400 connects to its LCD monitor with an MC-5U Monitor Cable, so there is a good chance the compatibility will depend on the interchangeability or adaptability between these two different interface cables.

The Canon EOS C400 6K Full-Frame Digital Cinema Camera (Canon RF) does not have a dedicated EVF.

It's not DGO, but with triple based ISO it'll be a far better low light capable camera than any other in Canon's cinema line up... You just might need to do some noise reduction in post depending on exposure and other lighting factors. Think Sony fx6 with modern improvments and Canon's proven track record for making diehard field tested cinema cams. They claim 16 stops of DR, but that would be under optimal conditions, in most cases you'll probably be working with less usuable stops. However, in setups where you're pretty evenly exposed throughout the frame but have to contend with darker areas like shooting into a car for example, you can bump your base ISO to clean up the image, then exposed down to bring back your details in camera. That will give up some additional DR as usual, but it won't matter because you'll still be able to focus on exposing your highlights while maintaining detail in relatively noiseless blacks. This is has been a fun Sony trick for a long time and finally Canon made it happen. All in all, current tests put it about 1/2 a stop difference from the c70 and c300 mk3, with more noise when going over or under, but the ability to bump your iso means you'll be able to compensate without having to push either way so much in post. It's not as clean as having dual gain output, but won't effect your ability to make HDR content.

6K resolution can only be recorded on the Canon EOS C400 6K Full-Frame Digital Cinema Camera (Canon RF) in full-frame mode. Please note that 6K can also only be recorded in RAW at this time as well. Super 35mm mode is limited to a max resolution of 4368 x 2304.

Yes, the Canon EOS C400, can record 4K DCI 23.98/24p using the full 6K sensor readout with no crop, since all 4K modes are derived from full-sensor oversampling.

Take a look at the specs for the Wooden Camera cage system for the C400.

Yes, the Canon EOS C400 6K Full-Frame Digital Cinema Camera (Canon RF) does have autofocus, which will work with photo lenses that also support autofocus.

The Canon EOS C400 6K Full-Frame Digital Cinema Camera does support 24p recording. Please review the Canon C400 manual pages below for a listing of all the resolutions and frame rates supported. See manual pages 66 to 69. https://bhpho.to/3Zamh2V