Is it normal to hear chattering noise in Fuji 35mm 1.4 x-lens when half-pressing and releasing the shutter button? Kind of annoying when the lens has focusing noise. Using the latest firmware.
Yes, this is normal, even if a bit annoying. It's the aperture stopping down to meter. In the original firmware, the X-Pro 1 did this all the time, not just with the shutter half-pressed. If you're curious, more on the firmware update that addressed this here; the X-E1 is newer and so shipped with that already in place.