Pictures are worth a thousand words. Here are two images:
Same lens, same photographer, same event, almost the same shutter speed and aperture. The differences are time of day (they're about an hour apart) and ISO. One is base, one is Lo-1. The cars are moving at very different speeds, though. Attachment#1 (jpg file) Attachment#2 (jpg file)
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!