One advantage of DSLRs is you can often pick up second hand lenses for them, at a fraction of the price that a new one would cost. For example I have an f1.4 50

One advantage of DSLRs is you can often pick up second hand lenses for them, at a fraction of the price that a new one would cost. For example I have an f1.4 50mm Pentax lens that cost me about £20 (although it doesn't have autofocus). A new equivalent would cost c. £380.