Читать книгу Digital Photographer - Литагент HarperCollins USD, J. F. C. Harrison, Professor J. D. Scoffbowl - Страница 10

Special considerations when shooting winter sports include the need to check the exposure carefully. Snow is white. To a human, such a statement is obvious; however, to a camera, it is not. When it is pointed at snow, the camera simply ‘sees’ a great deal of light and reduces the exposure to compensate. The result is dingy, dirty snow and figures which come out far too dark. One solution is to leave the camera set to automatic exposure, but apply an EV compensation value of + 1EV to + 1.7EV, depending on the camera and the prevailing conditions. Alternatively, set the camera to manual mode, take a meter reading from a subject in the same lighting and use this exposure for your photographs.

You need a long telephoto lens, a shutter speed of 1/1000 sec, and perfect timing to capture images like this…

PANNING Panning is a very successful technique for conveying a sense of movement.

1) Choose your viewpoint Firstly, prepare carefully for the shot. Plan where you are going to stand to get the best view of your subject. Think about the background as well, and try to pick one without too much detail.

2) Set a slow shutter speed You may need to experiment with shutter speeds to find the one which offers the best compromise between background blur and still keeping the subject acceptably sharp. Start with a shutter speed of 1/30sec and work up or down as necessary.

3) Match the camera movement to the subject The next part is the most difficult. You need to follow the subject with the camera as it passes, releasing the shutter as you do so. You will need to practise to discover the right timing for the shutter release. On your first attempts you may find that you are releasing it too soon or too late.

Look for ways of improving images in the computer. This bobsleigh shot lacked impact, but a little motion blur, and tipping the subject to more of an angle, increases the interest.

Tricky subjects like this, in which there is movement towards the camera, require fast, accurate autofocusing systems that can predict where elements of the picture will be at the point at which the shutter actually fires. Without these, parts of the image would almost certainly come out blurred, which would destroy what is otherwise an arresting photograph.

Many cameras are bought in order to photograph holidays, trips overseas and days out. All photographers, experienced or otherwise, will want to record these events.