Not too long ago I remember using those Kodak disposable film cameras to take pictures of homes. Seems archaic, but I'd get the films process at Sav-On, tape the photos onto an 8.5x11 real estate flyers I make on Word, then run 50-60 copies on the copier machine. Geez, how far we've come!
Now, we have so many choices of camera, Point and Shoots, DSLR, and recently iPad/iPhone! The question is what are you using and which yields the best results?
I personal love the hand-helds. They're small, lightweight, and get the job done. My camera of choice is the Canon SD880 (pic below). For point and shoots, Canons feel more intuitive and all the presents are ready to go. This one in particular is special because it's a Point and Shoot Ultra Wide Angle which is great for taking photos of rooms.
For very special properties, I bust out the Nikon DSLR 5100 with my Ultra-Wide 12-24mm lens. The DSLR is especially good for condos since the lighting is generally low and the rooms are very tight. Additionally, the DSLR is easier to use when shooting HDR photos.
I haven't used an iPhone or iPad to take photos... yet... I know the resolution is at par with iPad 2 and the "New iPad" but with my handy SD880 I usually opt for that. However, I have noticed more and more agents are using their iPads to take photos.