If the blur is what you are after, you need to take control and not leave it to chance. It is entirely out of your control and just depends on the aperture your camera chooses based on the light conditions. In some cases, you may get those soft, creamy backgrounds but you will also have lots of photos with sharp focus throughout. If you shoot in auto or shutter priority modes your camera chooses the aperture for you. To do this use a small aperture such as f/2.8, f/4, or f/5.6. Shallow depth of field limits sharpness to a single area in the frame and leaves the other objects and subjects deliberately out of focus. The focus of this article is achieving that blurred background look, and for that, you need to choose a shallow depth of field. There are several factors that influence depth of field, but the most important is probably the aperture you select. Basically, it is the portion of an image that is in sharp focus. Depth of FieldÄepth of field is the area of sharpness (from near to far) within a photograph. On the other hand, if a photographer is shooting "wide open" that means they are using the largest aperture (lowest f-stop) available on their particular lens. This simply means they are increasing the f-number, which allows less light in. You may hear a photographer discuss "stopping down" their lens. So a photo taken at f/1.4 is a much larger aperture than a photo taken at f/8.0. While a higher f-stop number indicates a smaller aperture, conversely less light is allowed in. It can be a bit confusing but a low f-stop number means a larger aperture where lots of light is being let in to the camera. Aperture is expressed in terms of f-numbers, which are also called f-stops. Aperture is the hole in your lens that lets light in to the camera body in much the same way as your pupil lets light in to your eye. If you typically shy away from technical discussions, I will keep this to a minimum. Before we delve into the practical application, it is important to understand the basics of aperture.
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