Sunday, October 26, 2008

Quick Tips for Black and White Photography

By SFXsource

Though color photography is quite common, black and white photography is often a great choice for exploring your creativity. This article lists quick tips for black and white photography.

1. There are a number of different file formats [negative sizes are listed]: 35mm (1" x 1"), medium format- 120 (2" x 2 "), and large format (4" x 5"). Beginning photographers generally use a 35mm SLR (single-lens reflex) camera. This type of camera lets the photographer view and focus the subject directly through the lens.

2. There are different film speeds for different situations; film speeds are rated by an ASA (American Standards Association) number. For brightly lit subjects, a slow film such as 32 ASA is used; slow film produces fine grain negatives. Outdoor photographers will typically use a medium film speed such as 125 ASA, and that produces medium grain negatives. A fast film speed, such as 400 ASA is best for indoor use, and produces coarse grain negatives.

3. Aperture settings control the amount of light entering the lens. A measurement of the size of the lens opening is called F-stop. A small F-stop is a bigger opening exposing the film to more light. A large F-stop is a smaller opening and decreases the amount of light reaching the film. F-stop ranges: 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22.

4. Focal length is a measure of the lens size, measured in mm. For a lens with a longer focal length, the angle of view is narrower. A short focal length has a wider angle of view. The following are lens types and their focal lengths: normal (50mm), wide angle (21-35mm), and telephoto (105-300mm).

5. Exposure time, the time the film is exposed to light, is determined by the shutter speed. Film is exposed to light for a short amount of time with a fast shutter speed. Film is exposed to light for a long amount of time with a slow shutter speed. Shutter speed range: B, T, 2, 4, 8, 15, 30, 60, 125, 250, 500, 1000. Shutter speed time can be determined by placing a 1 over each number so that you get a fraction. If you place a 1 over the 2, that means your shutter speed is a second.

6. Referring to shutter speed, the B stands for bulb, and the T stands for time. When you hold down the B, the shutter will stay open for as long as it is pressed down. If you use T, the shutter will remain open from the time you push it down, until it is pressed again.

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