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RF 200-800 does not focus when starting at 800 mm

Chandan_k
Contributor

I am Using RF 200-800 with my Canon R5 Mark 2 . I was having plenty of Issues with Using AF -  However Most are resolved reading through guides & community reading. However , One Thing is Still Bugging :   When I start shooting Shutter Priority , and Start focussing after Zooming the Lens at 800( without aiming the Subject, I syaert with 800 straight , it Does not Auto Focus with Back Button or any Other mechanism. However, When I gradually start Focussing 500/600 and Zoom out to 800 , the Focus worked Fine and I got Good Shots.  Is this a defect in my Lens or this is the way , this lens behaves ? Any responses on this will be appreciated. 

22 REPLIES 22

vantage
Enthusiast
Enthusiast

Click of "Firmware" icon for version 1.2.0 firmware  for R5 II.

https://www.usa.canon.com/support/p/eos-r5-mark-ii#idReference%3Dsoftware-drivers  

Screenshot 2025-12-02 at 11.52.46 AM.png

Thanks ! 

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