Here is Brassaï himself, towards the end of his life [in a 1976 interview with Claude Bonnefoy], describing one of his night-time expeditions in the early 1930s: 'I used to spend whole nights beside the canal, waiting for the right moment to take the shot, or in other words for a little fog to soften the lights. Often the hirondelles, the policemen on bikes, seeing a man squatting down would stop and ask me: "What are you up to?" And I'd say: "I've come to take a photo." At two in the morning, that seemed like an odd thing to do. So, I'd have a couple of prints on me so I could show them what it was possible to achieve at night. Then the ones that liked taking pictures would ask me for advice. I explained to them that I had several exposure times - the "Gauloise exposure", in other words the time it took to smoke a Gauloise, and the "Boyard exposure", which was about twice as long. This airy description, long after the event in question, contrasts with remarks made by Brassaï during the 1930s when he referred to 'a period of endless experiments with developers and exposure times', which were probably closer to the truth. The table of exposure times, reproduced at the back of Camera in Paris, shows that far from being a mechanical and repetitive practice the calculations involved a number of parameters, including natural lighting conditions and supplementary light sources. The exposure time could be anything from a fraction of a second to ten minutes or longer: 1/50 of a second for a photograph taken using flash ('14 July, Place de la Bastille'; 'Parisian cats'), one minute without supplementary light ('A carriage in front of "Le Dôme""), ten minutes for a Seine embankment shrouded in fog, or a panoramic view taken from one of the towers of Notre-Dame.
- Sylvie Aubenas & Quentin Bajac, Brassaï: Paris Nocturne, London, 2013, p.196-98.
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