E
E-6: Slide film development process. Used to develop Ektachrome, Fujichrome, Velvia, and several other slide films.
EDTV: Enhanced Definition TV. EDTVs are digital televisions that have higher resolution than 48i analog NTSC TVs, but lower than 720p resolution of true HDTV. Most EDTVs are 576p.
Efficiency: See Sensitivity
Ektachrome: Kodak slide film developed by E-6 process.
Electrostatic Speaker: A flat-panel speaker that uses a driver composed of thin membrane suspended between two electrically-charged screens. Electrostatic speakers are capable of very high resolution, transparent sound as we well as convincint stereo imaging, but are difficult to place in a room and sound best to listeners in the “sweet spot.” They are also a challenge for most amplifiers to drive due to low impedance and low sensitivity. They can also be somewhat fragile compared to other speaker technologies. See Dipole, Impedance, Sensitivity.
Equalizer (audio component): A tone control with many adjustable bands, usually inserted into the tape loop of a prempalifier or receiver. Most audiophiles shun the use of equalizers because they add distortion and noise. See Tone Controls.
Euphonic: As used in audio, euphonic is a term that describes pleasant or agreeable sound that may not be strictly accurate. For example, a turntable may have euphonic properties and sound better than a CD player, though the CD player reproduces sound more accurately.
Exposure: Amount of light reaching film or an image sensor. For a given amount of light, exposure is a combination of aperture (amount of light allowed through lens) and shutter speed (length of time light is allowed to hit film or sensor.) Amount of light & length of time= proper exposure. If you open the aperture to allow more light through the lens, you can use a faster shutter speed to decrease the time and still achieve a proper exposure. Though more light comes through the lens, it comes hits the sensor for a shorter period of time and the net effect is the same.
Exposure Compensation: Camera control used to adjust exposure in difficult lighting situations. Exposure compensation is most commonly used in heavily backlit lighting or when the subject is predominantly light or dark. See AEL.
