To gain optimum results and really
good pictures, you need to make sure you are using
your depth of field correctly. Depth of Field is a
combination of two settings, the shutter speed and
the aperture. A wide aperture, such as f/2.8 will
give only the focal point perfect sharpness and clarity.
the rest of the image will be blurry and unfocused,
this is a very desirable effect, but it is not always
what you want, generally wide apertures are used for
macros or intentionally blurry artistic shots. Small
apertures such as f/22 and f/16 are usually used for
portraits, landscapes and anything other situation
where you want the entire picture to be sharp and
focused.
Because a wide aperture lets a lot of light through
the lens, it will not take long to expose a film.
A wide aperture should be combined with a fast shutter
speed so the film is not over exposed. This works
the other way too. A small aperture is only a pinhole
big so lets very little light in. This means that
the smaller the aperture the longer the shutter
speed will need to be to expose a film correctly.
this works all the way down, and depends on what
the lighting is like where you are shooting.
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