EOS R5 windy day IBIS

[johnrmoyer]

Hello

On a windy day when multiple things are moving in different directions, it seems to me that the IBIS might get confused on the EOS R5. Even though the auto focus locks onto the eye of the bird, the image ends up soft. It appears that the bird is most in focus, but the image is still blurred. This seems to be true when there are leaves of grass or tree branches blowing around.

Is there a setting that would prevent this?

Thanks in advance.

(two attached photos are from the same day and near the same location)

Lark Sparrow at Lake Thunderbird todayPied billed grebe at Lake Thunderbird today

[johnrmoyer]

Thanks for responding. The Grebe photo was made before the Lark Sparrow photo.

• 1/2000 second for both
• both hand held from automobile window with engine stopped
• both at F/13
• both mechanical shutter
• mid day light
• focal length for both is 800mm
• for lark sparrow, exif has:
• "Focus Distance Upper : 18.82 m
• Focus Distance Lower : 15.17 m"
• and for grebe:
• "Focus Distance Upper : 50.04 m
• Focus Distance Lower : 39.39 m"
• Lens Model : EF100-400mm f/4.5-5.6L IS II USM +2x III

[FloridaDrafter]

I use the plugin, but DPP shows more info, like what case you were using, subject switching speed, servo, face +tracking, your focus point, etc. I just got a better feel for your shot 🙂

Newton

[johnrmoyer]

I like your swallow tailed kites

[johnrmoyer · Accepted solution]

I am somewhat confident that I have identified the problem. I left feedback for Canon using the link on their web page.

EOS R5 with attached Drop-In Filter Mount Adapter EF-EOS R and EF 100-400mm f/4.5-5.6L IS II USM and Extender EF 2x III.

Sometimes when the camera goes to sleep and then wakes up the IBIS appears to use the wrong focal length. Turning the camera off and back on seems to fix this.

I have placed CR3 files showing an example of this problem on my web server at:
https://www.rsok.com/~jrm/raw/IMG_7509.CR3
https://www.rsok.com/~jrm/raw/IMG_7530.CR3
Both photos were made the same day not too far from each other. They were hand-held and made from an automobile window with the engine not running. It was very windy. The earlier photo seems sharper and all of the later photos that day seem to have the same type of blur.

Thanks.

Camera serial number: xxxx
John Moyer
jrm@rsok.com