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Wednesday, April 2, 2008

Have some fun with Digital Photography

By David Peters

Photography is not just about pointing and pressing a button; it's a decision-making process. One of the best reasons for working photography into your activities and projects is that it helps people better understand the media images they're bombarded with every day. Photography is also just plain fun, and it's a wonderful foundation for community-based projects. If you introduce photography properly, it helps you look much more carefully at the world around you.

One has to be very careful when handling a camera, otherwise you can leave fingerprints on the opics of it. The problem with fingerprints on the optics is that your pictures won't turn out as clear in some parts as they could. In order for peak performance, and clear pictures, make sure you clean your camera all over reguarly with the right cloth and solution. Not all cleaning products work on the optics, such as tissue paper, fingers, saliva, or household cleaning solutions. Only use what you can get at a camera store.

Understanding how your camera focuses will help you get better pictures. Just about all digital cameras these days have autofocus with two-step shutter release. In dark lighting, you will notice that when you press the button halfway down, a red light appears for a moment, but not in areas that are lighter. Then, when you press the button down fully, there is a flash. When you hold down the button halfway, that focuses the image, and when you depress it fully, the camera takes the focused image. If you want the subject of your photograph not to be in the center but still focused, first center them in the middle of the picture and focus the frame by pressing down halfway. Without removing your finger, reframe the picture with your subject in the right position, and take the picture. Your subject will still be focused.

When you look at a picture where there are objects in the foreground and in the background, you may notice that, besides your main subject, some objects in front of your main subject and going all the way back to behind your main subject are also in focus. This "zone of sharpness" is called the depth of field. The depth of field is dependent on the aperture you are using, the focusing distance, and the size of the projected image. The depth of field decreases as you open up the lens, i.e. as you move to a larger aperture. It decreases as you move closer to your subject. And, at a fixed image size, the depth of field is the same irrespective of the focal length used. You would want to use a shallow depth of field to isolate your main subject from its surroundings, as in a portrait. You can accomplish that by moving in close, by zooming in (again, because it makes the background appear larger and more out of focus) and/or by using a large aperture.

Pictures don't just come out looking right. If you look at some of the pictures you especially like, you will notice that the way the picture was composed probably has a lot to do with it. What we mean by composition is how you place your subject(s) on the blank canvas that's your 4x6. If you mentally divide your screen into three horizontal and three vertical sections, where the lines intersect are focal points. Focal points are what the eyes naturally seek out when they look at a photograph. It therefore stands to reason that a focal point is a good place to position our main subject. It's not a hard and fast rule, so don't go bonkers trying to place your subject right at a focal point.

To take a successful landscape picture, you want the whole thing to be in focus. You'll want the focal length to be as short as possible, to create a greater depth of field. You can use the rule of thirds to create a balance between land and sky. Also, having a subject, such as an object in the foreground, might give a better sense of dimensionality. When photographing water, you will want to use a slow shutter speed, giving the impression of water flowing, and when photographing the sea, add a polarizing filter and give the water a transparency effect.

The panoramic picture is a new and exciting mode that is becoming more prevalent in digital cameras. Start by setting your camera on the tripod and ensure that it can only swivel left and right and not up and down. Take your first shot. Note the edges of the picture carefully and identify where you want to overlap the next picture. Choose an object where the overlap will be less apparent. Then, without moving the tripod to another spot, swivel the camera, say clockwise, and take your second shot making sure you have overlapped a part of your first shot. Continue to swivel and take shots until you have captured everything you wanted to. Then use the software provided with your camera to "stitch" the shots together to form your panoramic picture. If done properly, panoramic pictures (landscapes and group pictures) can be very impressive. Note that best alignment results are obtained from cameras with the tripod socket smack under the lens.

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