I guess if your bread and butter depends on using an IQ 250, these photos demonstrate the camera is able to deliver pristine files at ISO 6400. I think an Oly EPL-5 and two or three fast primes are better suited for night time street photography. With IBIS and f/1.8 lenses, it's possible to capture compelling pictures with very, very little light. Sometimes a little noise adds character. I'm not sure the law of diminishing returns justifies the cost of an IQ250, unless of course you are a well-heeled dabbler, shoot for high profile clients, or are a well-funded archive, museum, or some other type of
institution. I used to handhold an 8 X 10 camera loaded up with ASA 400 film pushed a stop or two. Wow, those images were smooth as silk, albeit stiff. ... Thanks for sharing, Brian.