A Brief History of Early Photography.
In the early 9th Century, Arabian scientist Alhuzen came up with the idea of the Camera Obscura. It is essentially just a darkened box
with a convex lens for projecting the image. This is where it's name derived from: Camera Obscura, latin for "dark room". This invention would be vital to the creation of the camera. When you use the Camera Obscura- or pinhole camera- you point it towards light and the following image would reflect through the lens and come out as a flipped image on the wall of the 'dark room'. A lot of 17th century artists were intrigued in creating a realistic image. They were interested in the idea of capturing a moment or image as a still frame and keep it frozen forever.
Professor in anatomy Johann Heinrich Schultz discovered that silver salts like silver nitrate, can turn from white to black when exposed to sun light.
with a convex lens for projecting the image. This is where it's name derived from: Camera Obscura, latin for "dark room". This invention would be vital to the creation of the camera. When you use the Camera Obscura- or pinhole camera- you point it towards light and the following image would reflect through the lens and come out as a flipped image on the wall of the 'dark room'. A lot of 17th century artists were intrigued in creating a realistic image. They were interested in the idea of capturing a moment or image as a still frame and keep it frozen forever.
Professor in anatomy Johann Heinrich Schultz discovered that silver salts like silver nitrate, can turn from white to black when exposed to sun light.
In 1834 Henry Fox Talbot used this idea to invent the Calotype process. This is where paper is soaked in silver chloride and fixed with a salt solution. Talbot created positive images by contact printing onto another sheet of paper.
Then French painter and physicist Louis Daguerre created a practical process of photography for the first time. This was regarded as the Daguerreotype. It involved using a silver plate that was polished and coated with silver iodide and developed with warm mercury. The Daguerreotype could only make positive images so in order to make other copies you had to take it again. This way of photography won in popularity against Talbot's as Daguerre's was made free by the government.
There were problems with photography, like the long exposure times. This means that the person being photographed often had to wait a few minuted being completely still so the camera can complete the image.
Camera Obscura.
Making the Camera Obscura was done in these steps.
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The SLR Camera
The Single Lens Reflex (SLR) camera is a camera that uses a mirror and prism that allows the photographer to see exactly what is being taken as the viewed imaged could be different to what is actually taken on other cameras. When the shutter button is pressed on a mechanical SLR, the mirror opens out of the light path, allowing light to pass through to the light receptor and the image to be captured.
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Apperture.
Apperture is a hole within the lens, where light travels into the body of the camera. The larger the hole (or smaller the aperture number) the more light that passes through the lens. This controls the depth of field, this is the portion of a scene that appears to be sharp. If the aperture is large the depth of field is small and vice versa. In photography aperture is typically expressed with the letter f. In my images I used an f stop of 3.5 - 22.
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(some of my own photos)
Shutter Speed
The shutter speed of a camera is the time it takes for the lens of the camera to open, allowing light in, and close. The longer the shutter speed the more amount of light coming in. This means that if you are taking a photo with a long shutter speed, the image will blur.