Diaphragm (optics) bright spots, for example night cityscapes. Some cameras, such as the Olympus XA or lenses such as the MC Zenitar-ME1, however, use a two-bladed diaphragm with right-angle blades creating a square aperture. Similarly, out-of-focus points of light (circles of confusion) appear as polygons with the same number of sides as the aperture has blades. If the blurred light is circular, then it can be inferred that the aperture is either round or the image was shot "wide-open" (with the blades recessed into the sides of the lens, allowing the interior edge of the lens barrel to effectively become the iris).
A Flower in a Sinful Sea addition the word sounds similar to "hua" (T: 華, S: 华, P: "huá", W: "hua"), meaning China. The title has also been translated as "Flower in a Sea of Sin", "Flower in the Sea of Retribution", "Flower in the World of Retribution", "Flower in a Sea of Karma", "Flower in the Sea of Evil" or "A Flower in an Ocean of Sin". In the earlier versions of the novel by Jin Tianhe, Sai Jinhua, a courtesan, travels to the west with her husband, a scholar. They meet Russian anarchists and the novel describes the history of the Russian anarchist movement.