Ewelina Czosnek

Ok, Done, Translated. SOrry

So tell me what language I wrote in. Or just turn off automatic translation and you'll have everything in English.

Thanks for your reply, but I’m already aware of those links. The issue I’m reporting is not about general compatibility or outdated firmware on the lens. The Tamron lens worked perfectly with older Fuji bodies like the X-S10 and X-T4. The problem started only after Fujifilm introduced changes to the autofocus algorithm in the latest firmware updates for X-Processor 5 cameras (like the X-S20, X-T5, X-H2, etc.). This is a recent issue and it’s unrelated to Tamron’s last firmware update in 2022 — which is exactly why I'm trying to raise awareness and push for a new update. I’ve tested the lens across multiple bodies and firmware versions — this is not a one-off issue, but a clear compatibility gap created by recent Fuji firmware updates. Tamron simply needs to update their lens firmware accordingly.

"This is my first time here and I didn’t know I was supposed to provide a translation. I specifically wrote my post in an international language — English — so that everyone can understand it or translate it into their native language."

Hi everyone, I’m reaching out to see if anyone else is experiencing the same issue. I own a Fujifilm X-S20 and recently updated the firmware to version 3.10, which includes changes to the AF algorithm. Since the update, I’ve been having major autofocus issues with my Tamron 18-300mm lens – the camera often struggles to focus, even on static subjects. What’s strange is that the same lens works perfectly on my older X-S10, which hasn’t received any similar AF updates (X-Processor 4). So this clearly seems to be a compatibility issue introduced with the latest AF algorithm changes in X-Processor 5 cameras. I’ve confirmed this across multiple bodies: X-S20 – firmware 3.10 – autofocus issues X-T5 – firmware 4.10 – same problem X-H2 – firmware 5.10 – includes the same AF update X-H2S – firmware 7.10 – also mentions AF revision X-T50 – firmware 1.10 – same story X100VI (X-M5) – most likely shipped with the new AF system pre-installed In contrast, cameras with X-Processor 4 (like the X-S10 and X-T4) still work flawlessly with the same lens. That pretty much confirms the issue lies in the updated AF logic, not the hardware itself. My partner owns an X-H2 and is now hesitant to update the firmware because of how badly my X-S20 now performs. We’ve both contacted Tamron and Fujifilm support, but haven’t received any real solution so far. Is anyone else dealing with this? Have you found a workaround or received any response from either company? If Tamron doesn’t release a firmware update for this lens, it may become unusable on the latest Fuji bodies — which is incredibly frustrating. Thanks in advance!