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All enlargers consist of a light source, normally an incandescent light bulb shining though a condenser or translucent screen to provide even illumination, a holder for the negative or transparency, and a specialized lens for projection, though some, such as the Rapid Rectilinear or Aplanat [citation needed] could be used in both camera and enlarger.
When laid flat, it may be called a light table. Generally, a lightbox uses light similar to daylight (5,000–6,000 kelvins (K)) and has uniform light strength on the glass pane. [3] In the form of vertical panels, they can also be found mounted on the walls of hospitals and medical offices to review X-ray images (X-ray illuminator). [4]
When film negatives are used, one image will appear in the shadows of the other image. This occurs as a result of the shadow areas being less dense than the highlighted areas of a negative. The more underexposed the shadows, the more clearly the image from the other negative will shine through. The opposite occurs when using transparencies.
To make it, you will need a cardboard pizza box, foil, scissors, pen, tape and a sheet of white paper. First, detach the two sides of the box from each other. Screen Shot 2017 08 17 at 5.55.41 PM
Melis based his cereal box viewer design on NASA's. George Melis, a sophomore at Clarkstown South, shows the items needed to build a cereal box eclipse viewer at Cornell Cooperative Extension in ...
Negatives are normally used to make positive prints on photographic paper by projecting the negative onto the paper with a photographic enlarger or making a contact print. The paper is also darkened in proportion to its exposure to light, so a second reversal results which restores light and dark to their normal order. [3]
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