This optical phenomenon has been increasingly used
for artistic effect over the last decade.
- Aperture - in a camera with manual controls you can change the size of the iris which allows light to fall through the lens and onto the sensor. By changing the aperture, the rays of lights are either elongated for deep focus (sharpness), or made taller for shallow focus (blurry). This is also known as the f-number, the higher the number the more things in focus.
- Distance to the subject - probably the quickest and easiest method. You can alter the angle of reflected light entering the lens by simply moving closer to the subject. By doing this your background will be sufficiently blurred. The closest images comprise of macro photography (we'll have another session on this soon!)
- Larger sensor size - smartphone cameras are notorious for having small sensors. A larger sensor increases its sensitivity and allows for wider angle lenses to gather more light.
- Longer focal length - using a telephoto lens at a longer focal length, standing further away, is one way sports photographers capture striking images.
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