International Cinematographers Guild Local 600 | 398 followers on LinkedIn. The International Cinematographers Guild, IATSE Local 600 is the largest camera and publicist union in the world. | he International Cinematographers Guild, IATSE Local 600 is the largest camera and publicist union in the world with over 8,000 members in all 50 states and Puerto Rico. We are a National Local of the International Alliance of Theatrical and Stage Employees (IATSE).