I was being invited to test the preproduction unit and provide some feedback to them some time ago. I only have some time to share my view right now and bear in mind the review is solely based on my own opinion.
I won't be able to provide some sample image as they don't allow me to publish any image. I noticed that in some countries they
already plan(or planned) to release it. Anyway I just let you all know of my thought.
Autofocus
Exhibit the same behavior as 5DIII, the whole viewfinder will turned red if VF illumination was turned on.
I was being informed, they're working on it for the fixes.
In term of performance, as expected, faster than 5DIII, I think similar like 1DIV
I've yet to see the advantage of the new AF which could track subject color and faces i.e in some situation where the 1DmarkIV /1Ds markIII failed, with the help of the iTR system it would able to excel.
Handling
Typical 1D series.
The button is smaller similar like 5DIII.
Silent shutter sound is a tad louder than 5DIII. They didn't promise that this would be fixed but they'd send the feedback to their headquarter.
I hope they'd fixed that as well.
The mini-joystick multi-controller feel better than the 5DIII multi-controller and the old 1D/1DS multi-controller,despite
being smaller.
Video
It's much simpler than the 5DIII which need to turn to left for video. For me I prefer the 1DX handling.
Exposure
Won't be able to see the advantage of the 100,000-pixel RGB AE sensor with 252-zone metering. Probably the 5DIII is already good enough for me.
Weather sealing
A check on the compartment reveal that the weather sealing is on par with the 1D. In other words, it's much better than 5DIII. With this I was being assured that if there's any assignment to shoot in the stormy dessert or heavy rain, I could do so without worrying much whether it'd failed. This is of course need to couple with a weather seal lens, complete with filter.




