This last shot is an attempt to give an idea of the low-light capability that this lens offers.
This photo of my home bookcase (again : a straight Faststone RAW conversion with zero PP) was shot at night, lit only by the glow of my computer monitor that is two meters away from it.
You will have to take my word for it : the naked eye does not see much here.
At F0.95, ISO 3200 and 1 second (with IBIS), it is like having night vision goggles without the green glow that we know from military and action movies.
(Surprisingly, the camera even got the auto-WB pretty accurate!)