Coping with chauvinism

I just wonder how other mature ladies cope with chauvinism please? I am in a team of five and the only female. Three men are over 60 and 1 is 50. I am coming up against what I think is blatant chauvinism. So far I have not really responded, just tried to let it go over my head. However, today I was asked to take a photo of the team to go into the local paper which meant I was, not for the first time, excluded. Is this only insulting if I let be? I took the photo and turned the situation into a joke, but actually I felt rather hurt. Part of me says "walk away" but the other part says " like hell". I am interested in how you ladies would respond. Thanks.