Will 1 series body actually drive the lens faster?

I know that 1 series cameras such as the 1DX use a much more advanced af system than cameras such as the 6D, but do the 1 series bodys which use a larger battery actually drive lenses such as the 500f4 faster than a camera with a smaller battery would?

As far as I know its the fact that the 1 series can process all the AF metering / functions faster using the higher battery voltage as they use a separate processor so there is no hold up

This in turn enables the lens to focus quicker it might not be that the lens will focus /drive quicker but the information gets there faster than say a 7dmkII -5dmkIII etc leading to a fast focus speed

Tcs have little slowdown on 1 series

I did ask some time ago if I could convert A 7d to take the higher voltage I was told it would burn the camera circuits as there not made to take it.

Rob.

According to this video (https://www.youtube.co​m/watch?v=s392i254_8M), the 1DX does drive the 85L somewhat faster from MFD to infinity and back. This seems to be independent of the AF subsystem as the lens is capped -- there is nothing to focus on anyway.

GyRob wrote in post #17974522
As far as I know its the fact that the 1 series can process all the AF metering / functions faster using the higher battery voltage as they use a separate processor so there is no hold up

This in turn enables the lens to focus quicker it might not be that the lens will focus /drive quicker but the information gets there faster than say a 7dmkII -5dmkIII etc leading to a fast focus speed

Tcs have little slowdown on 1 series

I did ask some time ago if I could convert A 7d to take the higher voltage I was told it would burn the camera circuits as there not made to take it.

Rob.

Thanks Rob......

don1163 wrote in post #17974513
I know that 1 series cameras such as the 1DX use a much more advanced af system than cameras such as the 6D, but do the 1 series bodys which use a larger battery actually drive lenses such as the 500f4 faster than a camera with a smaller battery would?

In a word - YES!
Within a given generation of cameras the Canon 1 series are faster and track better in my experience.
Whether this is relevant for your uses is another question. For me, and my uses, it is and I have paid the extra to get it. However, back in December, I bought a 7D2 and have to say that I am very impressed with it's AF performance. For all but the most critical situations it is more than adequate but the 1DX still has the edge.

My own experience was with a 40D and 1D mk3 driving a 50L and 85L shooting badminton. 40D chugged like an old steamer compared to the 1 series with either lens. I put I down to the battery though but maybe a processor thing too.

Chuck Westfall said:

"The EOS-1D X achieves a higher lens motor drive speed with select L-series USM telephoto lenses than the 5D Mark III because of the 1D X’s more powerful battery pack."

However, lens drive speed is only one part of achieving AF:

"The overall AF detection speed of the EOS 5D Mark III is superior to the AF detection speed of the EOS-1D Mark IV"

So it is only "select" lenses that can be driven faster and even with those lenses, a 5D3 may achieve AF faster than a 1D4.
Probably safe to assume 1D3 and 1D2, even with their big batteries, have even slower AF detection speed again.
Quite possibly true to say that a 5D3 can achieve AF faster than most 1 Series.

Source:
http://www.arihazeghip​hotography.com/AH_CW_i​nterview/

Thanks for all your answers guys.....

The 1Dx, and probably some earlier 1 series, provides more available current to the analog lens drive motor (it's not strictly due to higher voltage, though that is part of it); this has no effect on the metering or AF sensors as they get the same regulated voltage internally (you don't want to put more than the rated voltage on digital chips, trust me). The 7D mk II has essentially the same AF system as the 1Dx, but I expect the 1D series will still outperform it in raw AF speed due to the aforementioned advantage in drive current.

I tried this out with a 1Ds3, a 6D and a 7D once. I didn't have a way to record actual measurements but after turning the focusing ring on a 85 f/1.2L vII to it's closest focusing distance and focusing on the same subject from the same distance the 1D did seem to focus a tad bit faster than the other bodies. I haven't noticed any other differences with any of my other lenses.