| E |
| E-6: : |
| Standard chemical process for developing Ektachrome-compatible slide films. |
| EF: |
Abbreviation for "electronic flash." |
| EI : |
Abbreviation for Exposure Index. |
| ELECTROMAGNETIC SPECTRUM: |
| The entire range of electromagnetic radiation - all of its wavelengths, including those of visible light. |
| ELECTRONIC FLASH: |
Artificial light source produced by an electrical discharge traveling between two electrodes through a gas-filled tube. The light from electronic flash is approximately the same color as daylight. |
| ELEMENT: |
A single lens that is a component of a compound lens. |
| EMULSION : |
| A light-sensitive composition consisting of one or more of the silver halides suspended in gelatin for coating a surface of a film, photographic paper and the like. The image is formed in the emulsion. |
| EMULSION SIDE: |
The side of the film or photographic paper that has the emulsion coating on it. The emulsion side of film is recognized by being dull, whereas the base side of the paper is shiny. |
| ENLARGEMENT : |
| A photographic print that is larger than the film frame used in producing it. In popular use, however, most people think of an enlargement as being substantially larger than the image area of 35mm film - a print that is at least 5" X 7" or 8" X 10" in size. Also known as a "Blow-up." |
| ENLARGER: |
| An adjustable light projection device used in a darkroom to project an enlarged image from a negative through a lens onto photographic paper in various degrees of enlargement. |
| EPS (Encapsulated Post Script): : |
| Computer imaging format in which image lines, shapes and colors are described mathematically.
|
| EV: : |
| Exposure Value. Method of quantifying scene brightness, used as shorthand (usually assuming ISO 100 film) to indicate light levels (that is, -5 EV equals abysmal darkness; 21 EV equals brilliant sunlight on the beach). |
| EXISTING LIGHT: |
The light that is naturally illuminating a scene without any additional light that has been added by the photographer. Ambient light and available light are two other terms that mean the same thing. |
| EXPOSURE COMPENSATION: |
| Deliberately changing the exposure settings recommended by a light meter in order to obtain proper exposure. (Sometimes an exposure meter or light meter is “tricked” into providing settings that will underexpose or overexpose an image, for example, when the subject is relatively small in a field of bright, white snow. In such a case, a light meter may provide exposure settings that would underexpose the subject, and the photographer needs to “compensate” for proper exposure.) |
| EXPOSURE LATITUDE: |
A measure of a specific film’s ability to be overexposed or underexposed and still produce an acceptable image. It is measured in a range of ƒ-stops. Most negative films (regardless of brand name) have an exposure latitude of five to seven stops, whereas most transparency (slide) films have less exposure latitude –– in the range of three to five ƒ-stops. |
| EXPOSURE METER: |
| An instrument containing a light-sensitive cell used to measure the amount of light reflected from or falling on a subject. The measurement is usually expressed in shutter speed and aperture combinations that will render an acceptable exposure. (Also known as a light meter.) |
| EXPOSURE SETTING: |
| The aperture and shutter speed combination used to expose the film in a camera. |
| EXPOSURE: : |
| Describes the process by which a camera permits light to strike photo-sensitive film and record an image. |
| EXTENSION TUBES : |
| Tubes made from metal and, more frequently, plastic inserted between the lens and the camera, thereby making the lens to film distance greater. The result is increased magnification for close-up photography. They are sometimes also referred to as “extension rings”. They are frequently sold in sets of three different lengths, each of which can be used on its own or in combination with the others. When stacking more than one extension tube between the camera and lens, magnification can exceed life size. However, exposure time can be quite long as magnification increases since light must travel much further to strike the film. |
| EXTRA-LOW DISPERSION GLASS (ED): : |
| Describes specially manufactured glass that limits dispersion (or color fringing) of light rays as they pass through lens elements. |
