APERTURE.  The aperture is the size of the lens opening. It controls the amount of light let in:  A larger aperture lets in more light, while a smaller.

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Presentation transcript:

APERTURE

 The aperture is the size of the lens opening. It controls the amount of light let in:  A larger aperture lets in more light, while a smaller aperture lets in less light.

APERTURE  When the f number is small, the lens diaphragm is actually wide open.  If it is a large number (F22), then the lens diaphragm is smaller or more closed.  Opening lens = LOWERING f NUMBER  Closing lens = HIGHER f NUMBER

APERTURE  Besides letting in more light or less light…..  What does aperture actually control and why would we want to use it?

APERTURE  Aperture controls DEPTH OF FIELD  The higher the F number, the more of the photo that will be in focus.

APERTURE  If you’re taking a photo of a landscape and you want the foreground and the background to be sharp and in focus, you will need to set your f value (or aperture) to a large number. EXAMPLE: F/11  If you’re taking a photograph of a bird and you want the animal in focus but not the background, then you would choose a small f number like F/4

APERTURE