DSLR cameras, or digital single lens reflex, refers to any camera combining the ability to interchange lenses as you see fit and a mirrorbox that shows you, by way of the viewfinder, what the lens, and ultimately the image receiving sensor, see.

A tried and true technology, from which you can typically expect good battery life, ergonomics and a variety of features useful for the photography student all the way to the paid studio and event photographer.