Aperture

1. f/22, Wide Depth of field
2.f/1.8, Shallow depth of field
3. Idol statue at Langkawi at aperture f/2.8, you can use shallow depth of field by widened the aperture to have this sort of unique picture


Aperture is a hole in a lens which allow lights enter into it. Basically, aperture control the amount of light enter the lens. A lens has many structures that limit the ray bundles. These structures may be the edge of a lens. The aperture also control the shallowness of Depth of Field or in other words, bokeh . The lens aperture is usually specified as an f-number. The larger the opening of the aperture, the shallower the depth of field. For an example, if you are using 50mm f/1.8, you shoot a subject at f/8 the depth of field is wider resulting in sharped background of the picture. Then if you shoot at f/1.8 the depth of field is shallow resulting in blurred background(shallow depth of field).