It's a 6.1 megaipixel digital single-lens-reflex. As such, it uses Nikon's F-mount, and so all Nikon SLR lenses will work on the body. This is a good thing when one already owns a small collection. It has a built-in speed flash unit, much as is found on several of Nikon's SLR bodies (as well as Canon and other companies these days). There are several shooting modes:
Auto, which pretty much says it all. All settings (other than ISO, and even that may be set to Auto) are handled by the camera, so the photographer doesn't need to think about pesky things like shutter speed and f-stop, or the need for flash.
Portrait, which pretty much sets to aperture priority and sets the aperture fairly wide (small number f-stop) to decrease depth of field.
Landscape, just the opposite, small aperture (large number f-stop), to ensure great depth of field.
Action, fast shutter speed, aperture varies.
Additionally, there are several other modes:
P: Program mode, which the user may customize as for the programmed settings.
S: Shutter Priority, photographer chooses shutter speed, camera sets aperture.
A: Aperture Priority, photographer chooses aperture, camera sets shutter speed.
M: Manual -- and this is what all my old Auto-Index (AI) lenses do to this camera. Good thing I like manual cameras.
Many (not all) of the butterfly photos in the previous gallery were done in close-up mode. Most of the general shots around Key West were done in Auto, though I tended to over-ride the flash setting to "No Flash." All of the shots in Cozumel were done in Auto, most with no flash (all of the shots of the reef are no flash).
After photographing Hefalump with Nuts, we carefully moved him to a side table in the stateroom (with the nuts). It seems that the housekeeper responsible for vacuuming our stateroom thought so much of this that she started inviting all the other housekeepers to come see what we'd done...
There's some more from the Day At Sea, but I don't have them with me currently (finishing up a day at work, off the clock, posting photos). I'll post those later.
Overall, I'm not too displeased with the interaction between LJ and LJ's photo storage. The table is rather bland (I'd prefer to alternate photos from left to right, with text opposite as in this one), but hey, it's already paid for.