The Sony camera will support all the old Minolta AF lenses, going back something like 15-20 years. Indeed I recently tired the original 50mm standard on my last generation Minolta and was quite happy.
The advanage over Nikon and Cannon is that the image stabilizer is in the camera so lense can be much cheaper and still be image stabalized.
Also it has my favour lense which is a 500mm AF Mirror lense. Not you can't control the aperture; but by god do you get a lot of zoom for the weight. No-one else sell an AF Mirror lense that I know of. :-)