Originally posted by str8talk83 For someone who wants reach (like me) and can't afford the giant supertelephotos, the smaller sensor makes more sense. The crop camera system also gives a lot of cheaper options in the lens department that are just as good or very close to their FF counterparts.
Well, that's not really true when you take the DoF and FF's better iso into account... Truly equivalent lenses are then about the same weight/dimensions/price between the two systems.
For example, a 200/2.8 APS-C lens will be roughly the same size/weight than its equivalent 300/4.5 FF lens.
The loss of 1.5 stops in FF is offset by the better iso handling (for sensors of same generation, of course, no point in comparing a 5d with a k5 here).
So, for truly equivalent lenses, nope, price would not be that far, and sometimes reversed (FF being cheaper)... Just consider that the old lowly 28-80/3.5-5.6 translates into a 18-55/2-3.5, which would obviously cost a body part...