These were glass filters with a grid on the surface that created the “starburst” effect. Photographers used to use star or “cross” filters to achieve this effect. However, as with most other phenomena, you can use it to your advantage and enhance your repertoire of creative photography. The same concepts apply during the daytime as they do during the night time.ĭiffraction is usually thought of as a negative phenomenon, as it can lead to a loss of overall sharpness in an image. As you can see, the smaller the aperture, the more emphasized the starburst. The following charts show the effect of aperture on the size of the starbursts. With lower focal lengths (at the same F-Stop) creating smaller openings, so you should see more starburst at shorter lengths. If you keep the F-Stop the same, say at f/22 and you change the Focal length, from say 100mm to 50mm, the diameter of the aperture drops in half if you plug the numbers into the equation. Side Note: (feel free to skip unless you’re confused by the relationship between focal length, aperture, and the size of the opening): Think about the following equation: F-stop equals the focal length divided by the diameter aperture. Also, remember that the focal length also affects the size of the opening. So if you want to switch up the look, experiment with different lenses as well as different apertures. The more blades your lens has, the more “starburst” is possible. ![]() The number of rays from each starburst is related to the number of aperture blades in your lens. ![]() a small aperture at a low focal length, it bends around the edges of the blades and creates the “star” look. As light passes into your camera through a small opening, i.e. Diffraction is the slight bending of (light) waves around small obstacles and the spreading out of (light) waves past small openings. A star bust from a light source is the result of light diffraction.
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