Nikon's new SB-900 i-TTL Speedlight ($494.95) is a portable light source with many advantages:

* You can position the flash head so as to bounce 90 degrees up and 7 degrees down with 360 degrees rotation.

* The master Speedlight position can wirelessly control up to 3 remote Speedlight groups and an unlimited number of compatible Speedlights. There are four wireless channel options.

* There are three light distribution patterns: standard, center-weighted, and even.

* When used with certain Nikon digital SLRs, the SB-900 can identify mounted color gel filters and auto-adjust your camera's white balance accordingly.

For more about the new Speedlight's features, visit its page on the Nikon website.