It’s not. I tried multiple lenses and it’s present in all types of photos. Here is the mark on the sensor after wet cleaning. 

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Looks like mark on the menu, not the sensor.

I own a XT3 with a 18-55 lens and suddenly having same issue. Problem appear when try to zoom in. When I'm not using zoom I can take any picture. So disappointed. 

Hey guys,  I've cleaned my sensor multiple times and double checked it. This line shown in the photo only appears on my camera wen the aperture is f 2.8 or higher. 

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I'm using my X-S10 as a webcam using the latest version of XWebcam, on an M1 Macbook pro, recently updated to Sonoma 14.4.1. I've done the additional steps to enable external cameras here (system-override legacy-camera-plugins-without-sw-camera-indication=off) and have downloaded the latest version of XWebcam with the additional extension to enable my mac to connect to the XS-10 which it does successfully now, albeit inconsistently and with crashes. I've noticed that the 'com.fujifilm.xwebcam.CameraExtension' will sometimes hang and cause the camera to not be found and will need to be rebooted in order for my applications to find my camera again. Additionally, after successfully using xwebcam for a teams call, the memory footprint of the com.fujifilm.xwebcam.CameraExtension process blows up to 9GB which seems absurd. Looking for any guidance or updates to the camera extension for making this actually work in a usable way.