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On 6/6/2020 at 12:42 PM, gt3rs said:

I do mostly sports/action so not sure is helpful my experience.

I use 1Dx III quite a bit on a Ronin S and if I want shallow DOF I use 50 1.2 and 24 1.4 so the mode that I pick is 5.5k 24 or 25 and on a gimbal I never notice the RS.
I did track so far Parkour, MTB, Horse, rollerblades and never notice RS issue. If I don't need shallow DOF and/or need wider I use the 16-35 and f5.6 or above so I then switch to 5.5k 60 fps to have slow motion.
In case I need both I use 4k 60fps crop.
As you have the 1DC the weight size is about the same so you know what it means on a gimbal plus you are used to MF so using 1Dx III 5.5k 50-60 is not an issue for you.

The big question is how are the 4k FF 25,60 and 120 modes of the R5... if they are very good I think the R5 is even better than the 1Dx III....... if the FF 4k modes are binned and not super quality then the 1Dx III is better especially if you need 50-60 fps....

R5 advantage over 1Dx III (mostly guesses😞
- less weight
- flippy screen (not too helpful on a gimbal but is good to have)
- zebra
- 8k vs 5.5k
- quite cheaper

disadvantages:
- less battery life
- 60fps max out at 4k, if binned it will be less quality too
- if it has a 1-1 crop it will be 2x
- larger file size in RAW
- no RAW > 30 fps
- probably no dual card video recording (on 1Dx III the only dual recording mode is when in RAW.... as it does RAW in one card and whatever 4k mode you select on the other (from 8bit h264 to 10 bit h265 LOG).

If you are not in a hurry I would wait the first reviews hopefully will be in July .... and if you are undecided maybe rent both.... 

I’ve got the 1DXmkiii on a weekend test drive from Canon.

When you use it on the Ronin S do you get camera functionality ie start/stop and focus from the gimbal when plugged in via the usb c cable?

When I attach the usb c cable to the Ronin S I lose all camera fucntionality. Can’t change ISO, shutter speed, can’t record, magnify image etc.

I’m still on the fence as the FF 4K as an interview B cam & 50fps for gimbal would be perfect. Add to that the stills for time lapse. RS not an issue for most of what I do. But I’d be paying over the odds for the raw video and sports photography benefits I don’t need.

The question is - how long will I need to wait for the R5 or R6 and when they do finally come out, if the low light performance is worse than the 1dx and RS no improvement then might as well have gone for the 1dxmkii.

Question for those with the 1dxmkii. When you shoot 5.5K raw video, is this in clog2? Therefore, is the 4K proxy also clog2 rather than just clog?

Could be a good workout for 4K Clog2 and just bin the raw files to save on storage.

So I’m still in a dilemma about whether to get the 1DXmkiii or wait for the EOS R5.

I have a C500mkii and need a gimbal/B cam to match up as close as possible. Currently use my 1DC as gimbal/B cam but need 4K 50fps. Never upgraded to 1DXmkii due to cropped 4K and negligable improvement in image. Same reason didn’t get the EOS R, but do like the smaller size for gimbal.

Can live with RS as will primarily use at 50fps on gimbal or 25fps with the DPAF for simple walk and talks or interview B cam.

Needs to have good low light for events and fine with no zebras/histogram as use a monitor when on gimbal.

Will also use it for time lapse and some photography but nothing like sports.

My question is obviously hypothetical, but will the EOS R5 likely outdo the 1DXmkiii for the above needs or is the 1dxmkiii the camera to get. I’ve tried other brands but would prefer to stick with a full frame Canon to match my A cam as much as possible.

I’m interested to know if you’ll keep the 1dxmkiii? I had it on pre-order but cancelled the purchase. I currently use my 1DC for gimbal and time lapse, but no 4K 50fps is a bummer and the HD is soft as hell now! Wondering if the 1DXmkiii is worth upgrading to considering the R5 mat be out soonish. Other than the rolling shutter, how are you finding the camera for dynamic range, low-light etc?