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Many camera models measure the light that reflects off of the film plane, which controls the flash duration of the electronic flash. This is denoted TTL flash metering. Some electronic flash units can send out several short bursts of light to aid the autofocus system or for wireless communication with off-camera flash units.
Cameras for the micro four-thirds system are designed with the option of a replaceable lens, and lenses that conform to this proprietary specification are accepted. Cameras for this system have the same sensor size as the Four-Thirds System but do not have the mirror and pentaprism to reduce the distance between the lens and sensor.
The assist light (also known as AF illuminator) "activates" passive autofocus systems in low-light and low-contrast situations in some cameras. The lamp projects visible or IR light onto the subject, which the camera's autofocus system uses to achieve focus. Many cameras and nearly all camera phones [a] lack a dedicated autofocus assist lamp ...
The term camera is also used, for devices producing images or image sequences from measurements of the physical world, or when the image formation cannot be described as photographic: Acoustic camera which makes sound visible in three dimensions
Examples of such technologies include night glasses and low light cameras. In the military context, Image Intensifiers are often called "Low Light TV" since the video signal is often transmitted to a display within a control center. These are usually integrated into a sensor containing both visible and IR detectors and the streams are used ...
This sensor allows for acceptable image quality even at ISO 800. It is built into the FinePix S6500fd (2006) bridge camera and the FinePix F-series F30, F20 (2006), F31fd and F40fd (2007) compact cameras, all of which are widely accredited for their class leading low-light capabilities. [64] [65]
The camera also has a 3-step ND filter switch allowing greater control of how much light can enter the camera for maintaining a shallow depth of field or giving a softer appearance to motion. For one hour video shooting in 4K the camera needs about 32 GB to accommodate a data transfer rate of 50 Mbit/s. The camera's MSRP in the US is US$2,000. [8]
List of large sensor fixed-lens cameras; Light field camera; List of lightest mirrorless cameras; Line-scan camera; List of bridge cameras; List of digital cameras with CCD sensors; List of large sensor interchangeable-lens video cameras; List of retro-style digital cameras; List of superzoom compact cameras; Low light level television