I'm interested in putting together a list (as comprehensive as possible) of the different professional photography organizations that can be joined. The criteria is relatively simple:
- An organization that caters specifically to some aspect of photography
- An organization which does not limit its membership to a single local community
Please list only one organization per answer, a link to the organization's website, and if an organization has a 'focus' (e.g. 'caters to photojournalists,' or 'caters to advertising photographers') call it out in the answer.