Right now I mostly shoot "objects" vs people. I have read quite a bit on copyright and releases. For people "models" it seems relatively straight forward. If I understand correctly, taking pictures of private property, even if visible from public areas, would require a release if the image was to be used for commercial purposes. Is that a correct or at least mostly correct statement? Right now I find myself taking lots of pictures of old barns, abandoned places, ect which all do have owners. At the moment I have no plans of using any commercially. In the future if I decided to make a calendar or book of "old barns" that would become commercial and require a release. Is that correct? Last but not least. If I need a release, and I got a release when I took the picture, but I don't create the "book" for several years. At that time the property has changed owners. Do I need a release from the current owner?