As with most DSLRs, the Nikon D90 has an optical viewfinder that lets you view your subject through the lens. Following a popular trend though, it also offers a Live View mode, in which the mirror ...

Press it at any time and the mirror flips up and the camera immediately enters ... SLRs from Nikon's arch-rival Canon. In a new wrinkle, the Nikon D90 has only one autofocus mode in Live View ...