Depth of Field

Depth of field is the amount of space in front of or behind an object, that appears to be in focus. Image format size also affects the depth of field. When focusing in the depth of field everything in front and behind the focus point become less sharp and more blurred.

f/8.o f/5.6 f/2.8
Focal length does not affect depth of field, it is used to make the image bigger or smaller which will blur the image if you get to close.

Three toys in the computer lab on friday the 26th all in focus.
Three toys in the computer lab on friday the 26th with third object in focus.

Three toys in the computer lab on friday the 26th with first object in focus.

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Exposure

Exposure is the amount of light allowed to fall on the photographic medium. IF you have a longer lasting exposure you will be letting more light in and whatever you are taking a picture of better remain still or it will be blurry. If you use a shorter exposure it will take in less light and that is when you need to use the flash. You can set the shutter to be more open or more closed and you can determine the amount of light that is let in. Aperture is a hole or opening through which light is emitted. F-Stop is the focal length divided by the diameter of the lens.

These are four pictures of the same flower but from different angles around it. These pictures are all unique because they all show how big the differences can be by taking the pictures from different angles.