How a pinhole camera works.

A pinhole camera is a camera that works without a lens. A pinhole camera is made up of a light tight area, a small, pin sized, opening, and a shutter. A pinhole camera can be created in any kind of light tight area. A piece of photographic paper is placed opposite the pinhole opening to project the image it has been pointed at. This works because the photographic paper is extremely light sensitive and will capture the light that has been reflected off objects to create the image.

The camera will work differently depending on the amount of light in the area, the distance between the pinhole and the photographic paper (focal length), and the diameter of the pinhole (aperture). The aperture is measured in f-stops, with this; the smaller the number is, the bigger the aperture will be. By dividing the focal point by the aperture you will obtain the f-stop. The f-stop will tell you the amount of time you need to leave the shutter open in certain areas of certain light (shutter speed). The shutter speed is just how long you will keep the shutter open for. The shutter is a device that allows light to pass for a determined period of time, to capture an image. Shutter speeds are measured with a scale of;

B, 1, 2, 4, 8, 15, 30, 60, 125, 250, 500, 1000,

B being bulb, and 1 being 1 second. However instead of 2 being 2 seconds, it is a half of a second, and the rest of the numbers follow the trend of being the denominator of a fraction.