7artisans 10mm F2.8 Full Frame Ultra Groothoek Fisheye Lens 178°Handmatige Focus Compatibel voor Fujifilm G Mount.Zwart

The lens is great if you can manage to override the shutter button on the GFX 100S II by using something like the phone remote. Otherwise, it won't actually be usable to take photos, since the lens does not actually transmit ANY data to the camera, and the camera can't see aperture or other information. There might be a setting that overrides the shutter release lock, but I can't find it, and I'm sorta sad about that.Aside from the major issue above, the lens mount itself is not well machined, and feels loose on the camera.