Friday, 28 January 2011
Friday, 21 January 2011
1. Can you find Image evidence of the technique?
2. When was it first discovered and by whom?
1839 By Louis Daguerre
3. What is special about the technique?
4. How does this technique work? Can you find or describe the processes needed to make it work? Maybe illustrate how it is made.
Preparation of the plate prior to image exposure resulted in the formation of a layer of photo-sensitive silver halide, and exposure to a scene or image through a lens formed a latent image. The latent image was made visible, or "developed", by placing the exposed plate over a heated (about 30°C) cup of mercury. Daguerre was first to discover and publish (in the publication of the process and the English patent of 1839) the principle of latent image development
5. Can you comment how important this technique has been for the history of photography? For example was it popular and is it still used today?
Visual experience that is unique
1.
Can you find Image evidence of the technique?
2. When was it first discovered and by whom?
1700’s
3. What is special about the technique?
It was the first ever camera, but there was no way of saving/storing the image
4. How does this technique work? Can you find or describe the processes needed to make it work? Maybe illustrate how it is made.
The device consists of a box or room with a hole in one side. Light from an external scene passes through the hole and strikes a surface inside where it is reproduced, upside-down, but with colour and perspective preserved. The image can be projected onto paper, and can then be traced to produce a highly accurate representation
5. Can you comment how important this technique has been for the history of photography? For example was it popular and is it still used today?
Visual experience that is unique