Al Haytham was a scientist who made important discoveries of light, vision and optics. He wanted to explore in more depth the understanding od light and vision. In doing so Al-haytham used a dark chamber which he called Albeit Slmuzlim which formed the basics of photography. He discovered that light ravelling in straight lines through a tiny hole in the chamber projects an image onto the opposite wall. In conclusion to all his experiments he concluded that we can only see when light falls on the object and reflects back to our eyes.
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- (1594) The Camera Obscure means "dark room" in Latin as it was a dark room that helped artists to draw 3D images on to the walls of the chamber through a tiny hole on the opposite side where light was projecting the image onto the wall.the inside of the box was painted black and the image reflected by an angled mirror. |
- (1867-1944) Johann Schultz was a professor of anatomy. After many experiments he descoverd that silver salts turned black from white when exposed to the sun and the unexposed side remained white however he could not find a way to fix an image although later on his researched helped to build a foundation for others to go one step further. |
- (1771-1805) Thomas Wedgwood was the first man known to have thought of capturing an image so that it is permanent. He used paper and white leather coated with silver nitrate to make first images and observed that leather is more light-sensitive.His main target was that he would use the camera obscure however the chemicals that he used were not responsive enough and needed too much time to show any result. |
- (1839) Two men discovered different ways to fix an image. Henry Fox Talbot wrote a paper to the Royal Society about his invention process that creates permanent paper negatives.He calls it "Calotype" process, which allows many photos to be printed. Around the same time a man named Daguerre created his first Photo on a copper plate coated with iodide of silver although he discovered it by accident he named it “Daguerreotype” which is a high standard high-priced, process producing a single positives image. |
- (1854) George Eastman dropped out of school when he was 14 to support his mother and two older sisters when his dad died suddenly. in doing so he invented a dry-plate coating machine. Soon after patenting with Henry Strong, George Eastman formed the Eastman Dry-Plate Company because of this they made cameras available and accessibly. He also created a roll film was also the basis for the invention of motion picture. |
In class we have been learning about the history of photography and the camera obscura. We made the camera obscure with a cardboard box where you cut a small hole on one of the sides of the box and a magnifying glass (which effect the aperture.) on the the other. when all sides of the box is taped shut, light comes through projecting onto the opposite wall an the image you are looking at however the light is projected upside down. You then can trace over your image to get a beautiful 3D image.
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F22
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F3.5
these aperture photographs were taken at F3.5, F8 and F22.
As you can see aperture controls the blurring and focusing of images you can make images blurred and another thing focused. aperture is measured in F-stops. The higher the aperture the greater the depth of field (distance in front and behind the subject that is in focus) The lower the aperture the less distance is in focus either closer or further away to the camera. |