One point to note is that the old (film camera) lens will not make a great match for a DSLR. The lens intended for film will generally have a resolving power (at image plane) of the order of 10 microns, while the CCD pizel size (depends on sensor) will be of the order of 6 microns or so. Putting in a very simple (and not so accurate) manner, it means a 10 megapixel camera will produce picture quality some what equivalent to 6 megapixel.
Also, a 28 mm in film will behave like a 42 mm in D40/d80. D40/D80 do not use full frame size like Kodak N14.
Also, a 28 mm in film will behave like a 42 mm in D40/d80. D40/D80 do not use full frame size like Kodak N14.