7DII AF guide posted at Canon USA.

[viggen61]

Click the link below, then click to "Brochures and Manuals". Then download the AF Guide if you're so inclined...

http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_7d_mark_ii

 

[DominoDude]

Click the link below, then click to "Brochures and Manuals". Then download the AF Guide if you're so inclined...

http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/eos_digital_slr_cameras/eos_7d_mark_ii

Thanks a bunch, Viggen! That's one I had left to download.

 

[GRoel]

Hmm can't open it. It's protected by a password...

 

[beforeEos Camaras]

I did look at the 7d mk2 af system it sounds amazing I want it etc. all those af points at 5.6
and the center at 8 makes tele extenders really viable.

 

[alistairm1]

Has anyone who read this been disappointed by how quickly the 65 points drop to 45 points and then to 5?
Not sure now whether my 3rd party lenses will prevent me from getting this camera, as I won't see the AF advantages.

 

[Mt Spokane Photography]

Has anyone who read this been disappointed by how quickly the 65 points drop to 45 points and then to 5?
Not sure now whether my 3rd party lenses will prevent me from getting this camera, as I won't see the AF advantages.

Your third party lenses emulate a certain Canon lens model, they tell the camera that you have a Canon lens model XX attached. Depending on which lens(s) you have, the camera will activate the appropriate AF points. Of course, if the lens manufacturer did not reverse engineer the lens protocol correctly, it might not work. That happens.

This is the same for all Canon Cameras, the 7D MK II is no different in that respect.

So, your third party lenses must be keeping you from getting any Canon Camera?

 

[alistairm1]

Not at all. I've been more than happy with my lenses on my 50D.
But no matter which lens I mount on the camera I still get the same number of focus points.
From reading the AF guide, there are 6 groups of lenses.
Some of these allow all 65 to be used with the dual-cross centre point.
Others allow all 65 to be used but with the centre point only operating as a single cross.
Get down to the last group and you can only use the centre point with 4 others which surround it.
As the document is Canon produced it only includes Canon lenses. I'm now concerned that my existing lenses will fall into the
category with the centre point only active.
For me, it makes the camera a bit more of an unknown quantity, and as such reduces the appeal.
65 point AF where I can only use five of them would be a tad disappointing.

 

[beforeEos Camaras]

Not at all. I've been more than happy with my lenses on my 50D.
But no matter which lens I mount on the camera I still get the same number of focus points.
From reading the AF guide, there are 6 groups of lenses.
Some of these allow all 65 to be used with the dual-cross centre point.
Others allow all 65 to be used but with the centre point only operating as a single cross.
Get down to the last group and you can only use the centre point with 4 others which surround it.
As the document is Canon produced it only includes Canon lenses. I'm now concerned that my existing lenses will fall into the
category with the centre point only active.
For me, it makes the camera a bit more of an unknown quantity, and as such reduces the appeal.
65 point AF where I can only use five of them would be a tad disappointing.

well lets see if your shooting a f8 lens now you need a 7d a 5dmk3 an 1x and 7dmk2

and they all use the center only. I don't see a handicap its better then NO af at all at f8
but I am just a rank starter and know no better

 

[alistairm1]

But I'm not talking f8.
Look at the document and see that a lens such as the EF35-105 falls into this category. It has a max aperture of f4.5
The EFS 10-22 STM, again f4.5, is limited to 45 out of 65 focus points.

 

[lintoni]

But I'm not talking f8.
Look at the document and see that a lens such as the EF35-105 falls into this category. It has a max aperture of f4.5
The EFS 10-22 STM, again f4.5, is limited to 45 out of 65 focus points.

That's similar to my 5D3... some Canon lenses use fewer AF points than others. Anyway, the following article by Lens Rentals' Roger Cicala includes a table listing various 3rd party lenses, and what Canon lens they report themselves to be. You might see what your lenses report themselves as being and so get an idea of how many AF points you'd be able to use.
http://www.lensrentals.com/blog/2012/08/canon-illumination-correction-and-third-party-lenses

 

[alistairm1]

Thanks for the link.
I have some more reading to do.