Bao

Hello pw-pix, Thanks for your response, Actually, I mentioned testing on street because you can easily detect it when testing on street. But in fact only testing with small group of peope, even with couple, this issue also happen quite frequently.

I tried with boost, economy or normal mode, all not work. I tried with another xt5 from my friend with firmware 4.1, it also faced the same problem

AF is significantly improved on XM5, even you use old lens. I think that the result cannot be the same for all of lens because of their structure, but the AF of all lens will be improved.

Are you sure that your IS is on with "continuously" option ? Because I used both (XT4 and XT5) with prime lens such as XF35mm F2, 18mm F1.4, XF 56 F1.2 and I don't see any difference, XT4 IS is perfectly fine.

I observed that this issue only take place when using AF face tracking only. With other tracking, it didn’t happen.

Dear all i observed that my XT5 is quite lag while using AF eye Tracking. I want to upload video to prove but this forum not allow that. My setting: XT5 with XF 18mm F1.4 mark2 Firmware : 4.21 AF priority : Focus Pre-AF : On Sandisk extreme SD card 170mb/s Shoot in S Mode AF Eye tracking is ON Testing on street with many people, I saw that AF will be a little bit delay when I press half-shoot