If you change the aperture, or the light level changes, the shutter speed changes automatically. Archivability Good quality tape can be relied upon to withstand a wide range of temperature and humidity. If stored properly, the expected lifetime of a video tape should be anywhere from 10 years to beyond 30 years. Poor performance tape may start shedding over time especially if exposed to extremes of temperature. Also they may develop sticky substances as a result of high humidity exposure and the breakdown of the vinyl binders used to hold the magnetic particles onto the base film.
Artificial daylight is Artificial light having a similar color temperature to daylight.
Artificial light is all light not originating from a natural source - normally the sun. See also Interspersed Aspect Ratio. Used to reduce aberrations and enable a more compact lens size. Aspherical surface is a lens surface with more than one radius of curvature, i.e. the surface does not form part of a sphere. This is the measure of relative loudness of high frequencies compared to the playback level of the lower frequencies.