OK: Bringing camera or film equipment
There is no issue bringing cameras, action cameras, microphones, or filming gear into Iran. Photography and videography are generally allowed, and in larger cities you’ll even find skilled technicians who can repair or service your equipment at very reasonable prices.
The main limitation is clear: never film or photograph anything that might look like a police, military, or other official installation. When driving through sensitive areas, always switch off or remove any action camera. Even unintentional footage of such sites can cause trouble.
As everywhere, respect local customs and ask permission before photographing people, especially women and children. Certain religious sites restrict camera equipment. At shrines such as Imam Reza (Mashhad), Shah Cheragh (Shiraz), and Fatima Masumeh (Qom), only mobile-phone photography is permitted. Outside of these exceptions, you are generally free to use your gear throughout the country.
Though this doesn’t usually cause any issues, you may want to stay clean of having photos or videos on your phone from drinking alcohol or any other forbidden activities.