Pinhole Research
Depending on the type of pinhole camera you have whether it be home made or not, the camera will need a lengthy exposure, meaning its shutter maybe manually operated. It can range from 5 seconds to several hours. For example one you can make at home would require a can some black duck tape and film photo paper. You simply duck tape the lid of the can so no light is shone through and make a hole in the side where there will be a further flap of duck tape covering it. The tape cupping the lid will be removable so you can put the film paper in it. Once your in your surrounding you want to take a picture of, You have to place it down remove the flap keep the camera still for however long necessary, then close it.
When the light shines through the hole in the camera, it is reflected on the other side of the wall, leaving you with an inverted and reversed image of the scenery outside. This is shown in the picture above. Each point of the scene your taking a photo in will emit at least some light at the same time which will pass through the hole making creating the light necassery on the wall. The camera will create a smaller version of the scene and the film will record that paticular image whilst the camera focuses it. they are usually tighter at the bottom and grow in size as they get further out, as shown in the photos below. A common use of the pinhole camera is to take photos of the movement of the sun in the sky over a long period of time. This is called solarography and may be be projected onto a translucent screen for viewing things such as solar eclipses, or can also expose photographic film. The advantage of using pinhole photography for this as using a normal camera could damage your eyes looking directly at the sun. The advantages of using pinhole photography, is that it can be done without a professional pin hole camera as you can simply create one your self with a can, ducktape and some film paper to put inside it. This is still effective and works well. You can also create more ghostly effects with a pin hole camera in order to stranger yet wonderful photos. A disadvantage however is that pinhole photography is that when using a camera, to get the desired effect it could be extremely time consuming as the exposure times could last from either 5 seconds to several hours. Usually, it would be a number of hours if you wanted to photograph the day changing from night to dark - solarography or to see movement of traffic on motorways.
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