Oh hums the lens / mumbles a little to himself. In fact, you can hear it in very quiet environments.
I have no problem with that I would take to any event with it.
Even a whisper or mimes "concert".
A Canon USM lens makes when focusing far more "noise".
So at least the EF 28-70 f2.8 L, ES 70-200 F2.8 L IS II, ES Macro 100 F2.8 L IS.
In addition, if you move a 70-200 F2.8 L IS II with IS-ON it hisses dan already.
Not so the Fuji.
The Fuji lens is buzzing even if the camera is in standby mode.
Focusing is quiet and silent and fast compared to all fixed focal length lenses from Fuji.
The X-Pro1 is slightly slower than the T-X1 and has difficulty in the dark, that's because the the center focus point can not light up the LED. But the problem is not really the best then also helps the OIS not as dark.
Conclusion:
- Focus at maximum aperture at all focal lengths.
- Quiet enough for even the most demanding environments such as weddings, press release, classical concerts etc ...
I hope to have helped with my first impression.