This was a funny situation. I was waiting at the train station in Pori before the concert (my friend was queuing for something) so I decided to take pics whilst I waited for her.
I was a bit surprised that I needed to crank the ISO up to get a decent shutter speed, as it was quite bright even though indoors. As we left the building I realised I still had my 0.6 ND filter on the lens :) Still the 640 gives it a bit of grain so I'm not complaining. Fortunately I noticed or the rest of the day would have been a bit of a bust.