June 16, 2010
A very simple effect — the “starburst” around a bright light. This has been around so long that I sometimes forget that everyone does not know it. It is a great addition to images with bright lights in them.
You may have seen this effect with rays of light coming out of the sun or from a bright night light outdoors. It is dramatic and fun. Most photographers who don’t use this think it is from a filter. It is not. Anyone can create this effect.
The starburst effect will come from wider f-stops when you are using wide-angle lenses or small digital cameras such as a point-and-shoot. This is because it comes from diffraction of light through a small hole in your lens — the f-stop. With wide-angle and small cameras, that hole is physically smaller for any given f-stop compared to telephoto lenses (an f-stop is a mathematical relationship between the opening in the lens and the focal length).
I have had students in classes at BetterPhoto.com (my Impact in Photography and Understanding F-Stops classes touch on this effect) get frustrated because they can’t make this work. The reason is usually because they are trying to shoot the sun against a bright sky. The starburst (or sunburst) pattern doesn’t show up if bright areas surround the light. It only shows up when that area is dark.
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