One of the beauties of nikon camera bodies is being able to use a vast amount of lenses from many years ago, as is the same with pentax cameras. I think Canon are excluded since they have change a couple of times the mounting ring for lenses. So if you are not afraid of manual focusing this can help you economize, most of the time they can be found for cheap and are of really good quality.
I have a 28mm 2.8 AIS macro lens from at least 20 years ago, which works wonderful. In the D700 as in the D7000, camera meters without any issues, and aperture priority as manual mode can be use easily. Focusing is not a problem since the camera has, in the viewfinder, a set of arrows which will guide you if you need to move the focus ring to the left or to the right for achieving focus; when it has been achieved a green spot in the middle of the arrows will be seen. Its pretty precise and actually fast. Also considering that these lenses have a DOF indicator hyperfocal distance can be use for focusing in case you want to use them for street photography.
Can be found quite cheap on the market, so if you bump into it don’t doubt in getting one. If focus correctly lens can be extremely sharp. I have use it a lot for street and even some studio shots. Before getting the fuji, my D700 plus this lens was mostly the only thing a carry around with me.
A few examples of pictures shot only with the 28mm: