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Exposure
Exposure refers to how much
light is entering the lens. Over-exposed = too much light, under-exposed = too dark |
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| The aperture determines the image exposure. In bright light, use small aperture. In low light, use large aperture. Increasing aperture decreases Depth of Field |
The aperture is controlled by the iris. |
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F-stop indicates size of lens aperture |
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 Large f-stop = small aperture |
 Small f-stop = large aperture |
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| For brightly lit scenes, it is best to use a small aperture, with a large f-stop. | For a scene that is dimly lit, it is best to use a large aperture, with a small f-stop. |
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| Professionals like manual iris because they have more control over the exposure of light. | Auto iris is not popular with professionals because it over reacts with light backgrounds and they don’t have control. |