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Fuji 100-400 lens issue

Started 3 weeks ago | Discussions
djoronimo New Member • Posts: 1
Fuji 100-400 lens issue

Hi to everyone, I'm having an issue with Fuji 100-400 lens, I will try to explain an issue and see if anyone is experiencing the same thing. If not the lens will go for service.

The problem occurs occasionally and only at 400mm. When the lens is @400mm you can use it for let's say 5min without any issues and after that when it's been hold tilted downward for a while and then when you straighten it and try to activates AF, it does not respond when try to focus on infinity. What helps to unfreeze the autofocus and start focusing again is to zoom out a bit and return the lens to 400mm position, then it starts to work again until it is tilted downward again few times. It does not happen every time, it is necessary to do this several times in order for lens to start to not respond to autofocus command. I tried it on two XT4 bodies, all the firmwares are up to date and it does the same on both bodies.

This doens't happen with 50-140 lens that I also have. Tried every possible focus settings and it's not dependable on that, also IS on/off doesn't make any difference. So does this sound familiar to anyone ?

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