Vietnam is an extremely photogenic country with beautiful landscapes, diverse mountain cultures and many historical sites. You can photograph almost anything in Vietnam except military sites (bridges, docks, airports or government buildings). Taking photos of the police or police stations can also cause problems. The Vietnamese in general enjoy being photographed, although it is polite to ask permission first, and respect any possible objections. Some ethnic minorities, such as the Dao in the North, prefer not to be photographed. In popular tourist areas you have to pay to use a (video) camera. It is advisable to buy sufficient film/video prior to the trip, and avoid leaving it behind in locked cars, as the quickly rising temperatures can impair photographic material. Developing and printing of photographs is best left until you arrive home. Standard batteries are available throughout the whole country and are cheaper than in most European countries.