Pioneering photographer Julia Margaret Cameron was born 200 years ago, on 11 June 1815. To mark her bicentenary, the Science Museum has announced a new exhibition of portraits.

Julia Margaret Cameron
Julia Margaret Cameron, 1870, by Henry Herschel Hay Cameron, youngest son of the photographerHenry Herschel Hay Cameron © Victoria and Albert Museum, London

The exhibition, which will include the only existing print of her iconic portrait Iago, Study From An Italian, is drawn entirely from the world's largest collection of Cameron's photographs, the Science Museum Group's National Photography Collection.

Julia Margaret Cameron
Iago, Study From An Italian, 1867Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library

Cameron's bold portraits of influential artistic and literary friends, including Alfred Lord Tennyson, Thomas Carlyle and William Holman Hunt, as well as photographs of family members such as her niece Julia Jackson (mother of Virginia Woolf), revolutionised photography and helped immortalise the Victorian age.

Julia Margaret Cameron
Julia Jackson, 1867Julia Margaret Cameron © Victoria and Albert Museum, London
Julia Margaret Cameron
Alfred Tennyson With Book, May 1865Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
Charles Darwin, 1868, printed 1875Julia Margaret Cameron © Victoria and Albert Museum, London

A key element of the exhibition will be one of the National Photography Collection's greatest assets: The Herschel Album, compiled by Cameron in 1864 as a gift to her friend and mentor, the scientist and photographer Sir John Herschel.

Julia Margaret Cameron
Sir John Herschel With Cap, April 1867Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library

Representing for many the finest album of Victorian photography, it was the first photographic item to be placed under an export ban and saved for the nation in 1975. This marked a major milestone in the classification of photography as an artform and vindicated Cameron's artistic aspirations for her medium.

Born in Calcutta, modern-day India, in 1815, Cameron only took up photography aged 48 after being gifted a camera by her eldest daughter, Julia. She registered her first success with a portrait of Annie Philpot, daughter of her acquaintance William Philpot, and quickly amassed a body of work.

Julia Margaret Cameron
Annie, January 1864Julia Margaret Cameron © Victoria and Albert Museum, London

She is best known for her portraits of influential figures of the Victorian era, tableaux from notable poems and plays and character studies, using the wet collodion process.

Julia Margaret Cameron
The Mountain Nymph Sweet Liberty, June 1866Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
Suspense, 1864Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
Peace, 1864Julia Margaret Cameron © Victoria and Albert Museum, London
Julia Margaret Cameron
Sappho, 1865Julia Margaret Cameron © Victoria and Albert Museum, London
Julia Margaret Cameron
A Study After The Manner Of Francia, 1865Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
After The Manner Of Perugino, 1865Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
Study Of The Beatrice Cenci From May Prinsep, 1866Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library

She worked for most of her photographic career at her house, Dimbola Lodge, on the Isle of Wight, before moving to Ceylon in 1875, where she continued her photography until her death in 1879.

Julia Margaret Cameron
Woman, Ceylon, c.1877Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library
Julia Margaret Cameron
Young Ceylonese Woman Plantation Worker, circa 1875-1878Julia Margaret Cameron © National Media Museum, Bradford / Science & Society Picture Library

The exhibition will feature unique objects including a daguerreotype portrait (the first known image of Cameron) and her camera lens (the only piece of her photographic equipment known to have survived). Also on display will be handwritten notes from the original manuscript of her autobiography Annals of My Glass House, personal letters by Cameron and others and a selection of extremely rare photographs taken modern-day Sri Lanka during her final years.

Julia Margaret Cameron: Influence and Intimacy is at the Science Museum, London from 24 September 2015 to 28 March 2016.