Ida Kar, Peggy Guggenheim, 1952-53, @National Portrait Gallery London

by Ida Kar, 2 1/4 inch square film negative, 1952-1953

Ida Kar, Man Ray, 1954, @@National Portrait Gallery London

1. Ida Kar, Bridget Riley Louise, 1963, @National Portrait Gallery London

by Ida Kar, 2 1/4 inch square film negative, 1963

NPG x31651, Fernand Leger

by Ida Kar,photograph,1954

Ida Kar, Dame Barbara Hepworth at work on thearmature of a sculpture in the Palais de Danse, 1961 © National Portrait Gallery, London

Ida Kar, Georges Braque, 1960 © National Portrait Gallery, London

Ida Kar, Gustav Metzger, 1962 © National Portrait Gallery, London

Hoppé, Kate Edwardes, 1935, @E.O Hoppé Collection/Curatorial Assistence Inc.

by Emil Otto (\'E.O.\') HoppÈ, gelatin silver print, 1935

Hoppé, Marion Davies, 1921, @E.O Hoppé Collection/Curatorial Assistence Inc.

Hoppé, Mika Mikum, 1916, @E.O Hoppé Collection/Curatorial Assistence Inc.

by Emil Otto (\'E.O.\') HoppÈ, photogravure, 1916

Ida Kar, Sylvia Syms, 1950, @National Portrait Gallery London

Hoppé, The ‘Pearlies’, Master William Dennis Simmons, London, 1922 © 2011 Curatorial Assistance, Inc. / E.O. Hoppé Estate Collection

\"Hoppe Portraits: Society, Studio and Street\" exhibition at the National Portrait Gallery, London, 17 February - 30 May 2011