EOS RP pics taken with RF Extender 2.0 come out blurry

[Tims32ford]

In trying to take photos of a bald eagle in the top of a pine tree…about 100 yds away, every single image was out of focus.  Absolutely nothing is in focus…the eagle, NONE of the pine branches/needles.  I’m using a Canon RP with the RF 100-400 coupled to my just acquired refurbished (by Canon…purchased direct from Canon) RF Extender 2.0.  I removed the Extender and shot the same eagle/same location with probably just a 1 minute delay to remove and cap the extender.  Using just the RF 100-400…every image is SHARP…can be blown up to see just the eagle’s head…image is still SHARP. The RF body recognizes the lens and the extender.

Yes, AF switch is on.

Is there a chance the refurbished extender is faulty?

[jrhoffman75 · Accepted solution]

Can you post the two original images to One Drive or Dropbox so we can examine them? 
Based on what you just posted it sounds like you are enlarging the image too much. I don’t know about the RF 2X extender, but the EF 2X extender image quality isn’t great; additional “enlargement “ by cropping really degrades the image. 

[Tims32ford]

To everyone who replied with suggestions and ideas…a BIG THANK YOU!  Problem solved by just changing the AF to single spot AF…something that most of you know without thinking about it.

Thanks again!