Glass

One of the biggest reasons that I chose Nikon back when I was deciding what system to buy into was the fact that many of Nikons oldest lenses are still able to be used on new bodies. This meant that I could buy older glass that is still optically really good for cheap(ish). The only caveat to using these old lenses is that they require special settings on your new bodies, as well as certain body’s only work with certain lens types.