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).
The Torment of a Flower The Torment of a Flower The Torment of a Flower (), also known as Rainy Night Flower, is a Taiwanese Hokkien song composed by Teng Yu-hsien (; 1906 - 1944) and written by Chou Tien-wang (). A Taiwanese writer Liau Han-sin (廖漢臣) wrote the lyrics of a children's song ""Spring"" (春天) and gave it to Teng Yu-hsien to ask him to compose for it, it's the earliest version of "The Torment of a Flower." Although Teng is a Hakkan, he usually composed with Taiwanese Hokkien but not Hakkan. It is worth noting that some scholars have questioned this story about