[davidmanze]

The A9 will struggle in low light, concerning AF. The A9's hocus pocus to get electronic shutter fast enough without global shutter makes for some problematic issues with artificial lighting. All is not rosy in ML land either.

 

The D500 has f5.6 AF points, they can turn partly bling at f6.3, hence the struggling. 

 

I do not know if the 6D mk II gives better video as the D750. For sure, the 6D mk II has better live view, and better live view and video AF. The 5D mk IV's codec is an asset, not an issue. It gives high quality IQ, which was the whole point of "4K".

The 6D is photo camera, not a video camera for professional use. So I do get why they did not bother with a headphone socket, and with 4K (which would need more heat management.. something Sony does not care about). So, I do not see that as a big issue, 4K video for amateurs is just a spec sheet wish.

 

Nikon needs a capable partner to work with closely, concerning live view AF advancements. They do not manufacture their own sensors, they have multiple suppliers for their sensors complicating matters to a very large extent. They have made their 1st baby steps with the 18-55mm lens with stepper motor (like STM from Canon), but lack any camera yet making good use of it.

 

Canon 1st tackled the STM technology in some lenses, improved live view AF routines for them (CD AF in live view) before they started with on sensor PD AF points, after that (sensors with PD AF points) came with dual pixel sensors (making just about every pixel usable for the PD AF stuff). Small steps which by now make a smooth, fast and pretty refined system.

 

I have not seen any CF card or CD card fail, so for me dual card slots is the last thing i'd worry about.

 

  The D500 has 15 F8 AF points, which are in the center, F5.6 everywhere else.

 

    4 1/2 hours of 5D MKIV's 4K video needs  one Tb of storage,   that's ridiculous!!

 

That is OK for the odd clip here and there, but is not an asset quite the contrary,  which is why so few companies use it. Whether Canon couldn't be bothered to put in the appropriate compression or that they didn't want to risk sales of dedicated video cameras (who knows)  actually I do, It's the latter!

 

 

   The 6DMkII could do both pro stills and pro video..... 

 

   Whatever the scenario 4K with H264/ H245 or compression is way better than 1080P.

 

 

         Back we go again to the 10 cents headphone socket,

 

   Why can't ordinary people use a extension microphone?  you don't have to be a pro to not like poor sound quality.

 

       Again no second card slot saved Canon 150 cents ( I'm being generous).

 

    These limiting items are nothing to do with being reasonable, it's just market protection.

 

      When the pressure of ML starts tightening the screws, all of a sudden Canon and Nikon will change their modus operandum and give people what they "want" rather than what they decide they are going to be given!

 

  PS. The biggest advantage of dual cards slots is when you arrive somewhere to shoot and you've forgotten to put back in your SD card in the camera, luckily you still have a card in the second shot, I've done it so many times!