EOS R w/EF 100-400 L II, 1.4xIII Extender & Lens Adapter (Page 3): "f/8 and f/11 Compatible in All AF Areas With the EOS R camera, autofocus will operate over nearly the entire image...

dsmeltz Loc: Philadelphia

LFingar wrote:

Thanks for that! I have not seen that spec. Well, actually, I never looked for it much since I don't have a x2 extender. Couldn't even find the spec that said it went to f/8 but I know it does from having tested that. Where can I find that spec? Might give me the incentive to get an x2 extender at some point.

"f/8 and f/11 Compatible in All AF Areas
With the EOS R camera, autofocus will operate over nearly the entire image area even when used with compatible f/8 and f/11 lenses. This means the EOS R can easily achieve sharp AF using lenses with smaller apertures, and is even compatible with select EF extenders for uncompromised shooting at an expanded range of focal lengths."

About half way down the page here:

https://www.usa.canon.com/internet/portal/us/home/explore/product-showcases/cameras-and-lenses/full-frame-mirrorless-system/eos-r-system/eos-r-camera

LFingar Loc: Claverack, NY

dsmeltz wrote:

"f/8 and f/11 Compatible in All AF Areas br W... (show quote)

Thanks for that! This camera just keeps surprising me. Of course, just getting up some mornings surprises me!

LFingar Loc: Claverack, NY

RRS wrote:

Thanks, that was my understanding too. I checked a... (show quote)

As dsmeltz just showed with the link he provided, the EOS R will focus at f/11. As far as any delay in the EVF, I have not detected anything and focus seems at least as fast as my 5DIV.

RRS Loc: Not sure

dsmeltz wrote:

It depends on the camera body. Remember the EOS R maintains AF all the way to f/11. Previously the top was f/8. So this combination at full zoom would be f5.6+2 full stops or f/11. So, yeah it will have AF.

It was actually one of the most exciting features of the body (at least to me) when it was announced.

Thanks, I've looked all over and couldn't find that info even on the specs on B&H. Do you know where I could find it?

RRS Loc: Not sure

Evergreen12 wrote:

Ken Rockwell’s review reports autofocus on 100-400 with extenders. My understanding is the dual pixel with focus on the sensor requires less light than previous technology.

I have an EOS R on order and for me this was also one of the most exciting features. It will breath life into a couple older teles.

Welcome to the forum and thanks for the info.

RRS Loc: Not sure

dsmeltz wrote:

"f/8 and f/11 Compatible in All AF Areas br W... (show quote)

Thanks so much for the link, great info.

RRS Loc: Not sure

LFingar wrote:

As dsmeltz just showed with the link he provided, the EOS R will focus at f/11. As far as any delay in the EVF, I have not detected anything and focus seems at least as fast as my 5DIV.

So glad I followed up on this, more info here then on B&H. I think this will be the new camera for my wife as the 300mm f/2.8 with a 1.4 and the 7DMKII with battery pack is pretty heavy. The 100-400mm is also going to be ordered. Thanks to all for the info and links. I still don't understand why this info is not shown on the specs, this is a big selling point.

LFingar Loc: Claverack, NY

RRS wrote:

So glad I followed up on this, more info here then on B&H. I think this will be the new camera for my wife as the 300mm f/2.8 with a 1.4 and the 7DMKII with battery pack is pretty heavy. The 100-400mm is also going to be ordered. Thanks to all for the info and links. I still don't understand why this info is not shown on the specs, this is a big selling point.

Canon.com currently has a refurbished 100-400 L II listed for $1759.00. That's a savings of over $400 on a lens that is every bit as good as new.

https://shop.usa.canon.com/shop/en/catalog/ef-100-400mm-f45-56l-is-ii-usm-refurbished

RRS Loc: Not sure

LFingar wrote:

Canon.com currently has a refurbished 100-400 L II listed for $1759.00. That's a savings of over $400 on a lens that is every bit as good as new.

https://shop.usa.canon.com/shop/en/catalog/ef-100-400mm-f45-56l-is-ii-usm-refurbished

Thanks!