aperture.ppt

Aperture`

Every time you take a photograph, the lens of your camera opens to let in light.

The APERTURE setting determines how much or how little your lens opens when you take a photograph.

The bigger the aperture (f/22)the less light

The smaller the aperture the more light(f/2.8)

What is Aperture?

Why Aperture Really Matters…

When your lens is open very wide, the background is typically out of focus.

• Wide-open aperture is good for portrait photographs, when you don't want the

background to interfere with your subject.

When your lens is only open a small amount, everything from the foreground to the background is in focus.

• Slightly-open aperture is used for landscape photographs, so that all of the scenery in the photo is in focus.

Depth of field and Aperture

Aperture has a big impact on depth of field.

Large apertures (smaller f/stops) will decrease the depth of field:making the background out of focus

Small apertures (higher apertures) will increase your depth of field:making the subject and the background be in crisp focus.

F10.7 F5.4 F3.9

F5.4

………Let me illustrate

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f/22 f/2.8

The Aperture / Depth of Field Relationship

When you focus your camera on an object in space, you are also focusing on everything else around the object that is the same distance away from the camera.

This can also be described as focusing on a PLANE, rather than a point.The following illustrations will introduce you to two important concepts: plane of focus and depth of field.

•The camera is focused on GWEN STEFANI (Item B)•Since the camera is focused on B, this is where the plane of focus is located — you may have heard of a point of focus (or focal point) but in reality everything that is on the plane of focus (even if it is to the side but the same distance from the camera) will be in focus.•CIARA (C ) is also in focus since it is on the same plane as GWEN•The MIC, Kayne and Jay-Z are not in focus

•The camera is now focused on the MIC•Since the camera is focused on the MIC, this is where the plane of focus is located•Only the MIC is in focus•Gwen, Ciara, Kayne and Jay-z are not in focus

f4.5 (wide open) = LARGE AMOUNT OF LIGHT

f8.0 (somewhat open) = MEDIUM AMOUNT OF LIGHT

f22 (almost closed) = SMALL AMOUNT OF LIGHT

(Relationship between aperture and actual light)

FSTOP TRANSLATION

What is Aperture priority?

Many digital cameras can be set to aperture priority mode. “A”

In this mode, you set the aperture and the camera automatically selects the shutter speed so that the photograph has the right exposure.

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