How does the aperture affect exposure A WIDELARGE fstop is a SMALLER number f2 OPENS the aperture for MORE light A SMALL fstop is a LARGER number f22 CLOSES the aperture for LESS light ID: 646917
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Slide1
Aperture & Depth of FieldSlide2
How does the
aperture
affect exposure?
A WIDE/LARGE f/stop is a SMALLER number (f/2) = OPENS the aperture for MORE light
A SMALL f/stop is a LARGER number (f/22) = CLOSES the aperture for LESS light.Slide3
How does the aperture affect
depth
of field?
An example of shallow depth of field (large f/stop)...
This photo was taken with an f/stop of f/2.0. W
anted
to really focus on the contrast between the pretty headband and the dirty toddler fingers,
a large
f/stop to really narrow down the depth of
field was used. As you can see, the main areas of focus in the picture are the fingers and the jewels on the headband, with everything else in the image much softer. Shutter speed of 1/125 and an ISO of 400.
An example of a wider depth of field (smaller f/stop)...
S
maller
f/stop of f/10
was used to
take this image of the sunset in Hawaii.
We wanted the scene
to be mostly in focus, and you can see that for the most part the foreground, middle and background of the image are all in focus.
Shutter
speed of 1/160 and an ISO of 100.Slide4
f/1.2
f/2.8
f/22Slide5
The above photos have the exact
same shutter speed and ISO setting (1/250, 400) and only changed
aperture
. You can see how the larger the aperture (the smaller number) the more light is let in, the smaller the aperture (larger number) the less light is let in.
A comparison of how
aperture
setting can
affect
the
exposure
of an
imageSlide6
A comparison of how
Aperture
setting can affect
the Depth of Field
of an
Image
In the photos above all three of settings have been adjusted to
achieve correct exposure of the scene (no blown out or over-exposed highlights and good detail in the shadow). By looking at the scene behind the little bear, you can see that in the first image with the larger f/stop (f1.4) the background is totally out of focus and blurry. With a slightly smaller aperture we start to see that background come in to focus, and with the last photo that has the smallest aperture (f/16) the background is clearly in focus and you can make out the swings and other detail in the background.Slide7
Aperture f/stop numbers & Exposure
Small number = more light
Large number = less light
Aperture f/stop numbers & Depth of Field
Small number = Small depth of fieldLarge number = Large depth of field
REMEMBERSlide8Slide9
View – Analyze – Discuss
DifferencesSlide10
View – Analyze – Discuss
Differences
Source: http://www.kyliepurtell.com/2015/10/photography-basics-aperture.htmlSlide11
CAN YOU TELL THE DIFFERENCE