Tracing Stars III

Took my landlady's dog for a little midnight walk. Even though it was overcast all day it somehow cleared up at night. Saw this window across the street and couldn't help but try that. Stood there like an idiot for 50 minutes (after returning the dog) until I had enough.

From looking at my star trail pics you can easily understand that I'm working with high ISO. I'm forced to do that as my wide angle lens max aperture is f/4.0. Not that I would mind. Often I add noise in post processing as I like the gritty feel of it. It's a bit like the design of this blog here. It's not slick and all, it's somewhat raw ;-)However, next time I get the chance I'll try that with something like f/1.4. This should allow me to get the same strong star light with much lower ISO. Curious how that would turn out...