Getting back to the original post: Some of the issues are: 1. Finding and purchasing adapters. 2. Lenses designed for film cameras may not work as well as you had hoped when mounted on a digital camera. If it were me, I would create a shadow box display for that old gear and include at least one photograph of your grandfather, and some photos he took with the gear. You'll get much more enjoyment from doing that then you will from using those old lenses.