Another gallery tip if you are in Los Angeles - there are 3 good photo exhibitions on at the Getty centre, Brentwood.
1: Andre Kertesz, not a comprehensive collection, more an eclectic selection. Interesting to see that many of the prints were contacts from 645 negs. Mostly his early Hungarian work. There are also shots from Paris & New York, some of the masterpieces as well as some I'd never seen before.
2: the Nude - a selection of 2 dozen or so images of the human body across the history of photography. Starting with a couple of daguerreotypes including one erotic shot of two nude women, presumably intended for private delectation. Further on there is a Bill Brandt shot done with the police camera next to a Diane Arbus shot of a nudist husband & wife.
3: Graciela Iturbide - comprehensive survey across several large rooms of this Mexican photographer. Very interesting for me to see after having just spent 5 weeks in Mexico, although I was in DF whereas most of her shots are from regional areas. Have to admit I'd never heard of here before but I was impressed by her work. Ranges from documentary style to poetic fine art work. Some photogravures & platinum prints, but mostly silver gelatin.
Getty centre obviously has very deep pockets, both for collecting as well as curating.