Social Conventions
Shaking hands is the normal form of greeting. If you are visiting a more remote area, expect to be met with curiosity. Gifts may be offered to you as a sign of friendship or respect. Never refuse such a gift. To honour the giver accept the gift with both hands and thank them warmly.
Photography
Most Zambians will be only too pleased to let you photograph them, provided you ask permission first. You may find that this results in a lot of posed, smiling portraits. If you are looking for a more natural feel ask for permission, shoot a few photographs and wait for a while. This will give them time to get back to their normal routine and not focus so much on the camera. A silent shutter is also a good idea.
Never take any photographs of any military or governmental institutions.