I have been doing night skyline photography for a while and have gotten decent results although after seeing Digital Matt's nighttime panoramic of Clevland I have a question. How can I get really sharp buildings in my night photos? Often the lights in the buildings are a bit soft whereas in Matts shot the buildings are extremely crisp. I think my settings are fine usually 30 second exposures with aperatures above 13. Could this jsut be a result of my lense or camera or is there anything else I can do?