You'll have to deal with reciprocity failure, otherwise known as the Schwarzschild effect. You'll also be limited to lower sensitivities (ISO) with most readily available film than with most digital cameras. With film you won't have any hot pixels, but faster film is grainier than slower film.

Unless you're willing to invest in a fairly expensive sidereal tracking mount that compensates for the earth's rotation with respect to the celestial sphere you will be limited on your exposure times unless you're looking to make images that include star trails.

With digital you can take the equivalent of long exposures by taking many shorter exposures and combining them. This usually works out much better than a single long film exposure.

You'll have to deal with reciprocity failure, otherwise known as the Schwarzschild effect. You'll also be limited to lower sensitivities (ISO) with most readily available film than with most digital cameras. With film you won't have any hot pixels, but faster film is grainier than slower film.

Unless you're willing to invest in a fairly expensive sidereal tracking mount that compensates for the earth's rotation with respect to the celestial sphere you will be limited on your exposure times unless you're looking to make images that include star trails.

With digital you can take the equivalent of long exposures by taking many shorter exposures and combining them. This usually works out much better than a single long film exposure.