What is the conversation mainly about?

W: Hey Steve, got any plans for tonight?
M: Hi, Jane. No, I don’t think so. Why? Got any suggestions?
W: In fact, I do. I just got two tickets to the opening of the exhibit of the reprints by Julia Margaret Cameron. I should have mentioned it earlier, but I was on the waiting list for these tickets and I wasn’t sure I’d even get them.
M: An exhibit, huh? I like such things. But I don’t know who Julia...
W: Margaret Cameron! She was a photographer in the 1800s. She is interesting to art historians in general and students of photography in particular because she ... how should I say, changed the aesthetics for photography.
M: What do you mean?
W: Well, her specialty was portraits and instead of just making a factual record of details like most photographers did, you know, just capturing what a person looks like in a dispassionate sort of way, she, like a portrait painter, was interested in capturing her subject’s personality. M. Interesting! How did she do that?
W: She invented a number of techniques that affect the picture. One of those things she did was to blur images slightly by using a soft focus on the subject. That’s pretty common now.
M: Yeah, seems so. Who did she photograph?
W: Famous. people of her day: Alfred Lord Tennyson, Henry Wadsworth Longfellow, Charles Darwin; I don’t know who else. We’ll see at the exhibition.
M: You really pick my curiosity. I am going to enjoy this.