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Boy Scouts
of America
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About Troop 701
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Links to helpful information:
Troop Meeting Ideas
Things to do when working on this merit badge:
PHOTOGRAPHY
This illustration shows a fairly standard traditional SLR camera with manual controls. The make and model are not important as most cameras of this design will have similar controls in similar places.
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Lens
One or more pieces of optical glass or similar material designed to
collect and focus rays of light to form a sharp image on the film, paper,
or projection screen.
Shutter
Blades, a curtain, plate, or some other movable cover in a camera that
controls the time during which light reaches the film.
Viewfinder
A viewing device on a camera to show the subject area that will be recorded
on the film. Also known as viewfinder and projected frame.
Camera Angles
Various positions of the camera (high, medium, or low; and left, right,
or straight on) with respect to the subject, each giving a different
viewpoint or effect.
Exposure
The quantity of light allowed to act on a photographic material; a product
of the intensity (controlled by the lens opening) and the duration (controlled
by the shutter speed or enlarging time) of light striking the film or
paper.
Negative
The developed film that contains a reversed tone image of the original
scene.
Transparency
A positive photographic image on film, viewed or projected by transmitted
light (light shining through film).
F-Number
A number that indicates the size of the lens opening on an adjustable
camera. The common f-numbers are f/1.4, f/2, f/2.8, f/4, f/5.6, f/8,
f/11, f/16, and f/22. The larger the f-number, the smaller the lens
opening. In this series, f/1.4 is the largest lens opening and f/22
is the smallest. Also called f-stops, they work in conjunction with
shutter speeds to indicate exposure settings.
| Picking the best viewpoint | |
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Here, on the left, is a very unsuccessful photo! The cameraman had snapped away without positioning himself where he could see his subjects properly. Contrast this with the two pictures below: |
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These photos of the same scene are much more successful
because I had:
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| So, once you've decided exactly why you want to take a photo, the next job is to search around for the very best position from which to take it: | |
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| Here, I knew what I wanted to photograph: the peacock. But is this really the best view I could have got of it? You can't see its tail, and the peacock doesn't stand out from the background. Compare it with the picture below .... | |
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| ....where I had selected a better angle to show off the the tail, and had waited until there was a background that contrasted with it. As always, it's a matter of deciding what most interests you in a scene, then making sure that you show it really clearly. | |
| Improving
the picture |
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photo on the left would benefit from some foreground framing, as
on the right. It was only a question of moving back, so as to include
the tree branches. These add depth to the scene. Watch any amateur
photographers in action and you can often pick out the more experienced:
they are the ones who have moved from the most obvious camera position
to search for foreground framing! The other main fault with the photo on the left is that the roof comes exactly halfway up the picture. Usually try to avoid having the horizon exactly in the middle as it cuts the picture in two. It would have been even worse if there had been no chimney pot to break the line. |
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| It's
often better not to position your subject right in the middle
of the picture as I've done on the left. It is usually more pleasing
if the subject can be positioned at one side, or at least some way
off-centre, as on the right. The best place for your main point
of interest is often at or near the intersection of thirds (these
are shown by the lines I have added). If you have an automatic camera,
though, remember to focus on your main subject before you swing
away from it. The composition of the picture can be changed by using azoom
lens (or separate lenses of different focal lengths,
such as a wide angle or telephoto). This way, the apparent distance
between background and foreground can be modified: |
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| The
photo on the left was taken at the telephoto end of the zoom. The
one on the right used the wide angle end of the zoom . Notice the
change in the foreground-background distance: the telephoto setting
(on the left) makes the background appear much closer in. (The same
foreshortening effect can be seen if you look at the path in front
of the house in the picture on the top right of the page, for which
I also used the telephoto end of the zoom. Here the telephoto also
usefully reduced the apparent distance between the foreground leaves
and the house in the background.) Portraits should preferably
be taken at around 80-90mm to avoid distortion. If you use a wide
angle setting, your subject can end up with a very large nose,
disappearing ears, and a generally distorted face, as shown on
the left below: |
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| Left:
using the wide angle end of the zoom (35mm) is not a good idea for
portraits! Right: using the telephoto end of the zoom, or at least 70mm (as here), is much more pleasing.
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