Slow Sync -- in a Flash!

What flash features does your camera have? Red-eye reduction? Rear curtain sync? Slow sync? A pop-up or external flash typically has no difficulty illuminating an intended subject in the foreground. However, background (& image context) may not be if the flash is under powered for the job. Thus we consider slow sync -- which uses the flash but with a longer shutter speed that exposes the background.

Here's a shot using my D300 and SB600 inside the local grain store. The foreground is lit, but the backgroud is dark. (f/4, 1/60 sec.)

In the following picture, slow synch is used. The exposure time is longer: f/4 again, but 1/5 second. This worked OK in spite of the fact that I had the camera in "Commander Mode" instead of TTL.