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A ring flash is a circular light that is often operated with a camera lens in the center to take photographs. Unlike point light sources , a ring flash can illuminate a subject with minimal shadows by closely and evenly surrounding the optical axis of the camera lens.
The SGI Indy, released in 1993, is the first commercial computer to have a standard video camera, [4] and the first SGI computer to have standard video inputs. [5] The maximum supported input resolution is 640×480 for NTSC or 768×576 for PAL.
Many mono 'computer' mics are fitted with TRS plugs. The tip is for the MIC and the ring is for power (to power an electret-condenser style MIC). There are exceptions to the above: Hosa cables use grey and orange for left and right analogue channels. RadioShack cables sometimes use grey and black for left and right.
The blink video doorbell is a wirelessly connected smart device that allows video and audio to be viewed via another device. It works similarly to the Ring doorbell, including in its ability to connect to Amazon Alexa and an offering of a "plus" subscription, which allows greater cloud storage capacity and syncing of multiple devices. [9] [10] [11]
LCDs do not produce light by themselves, so they need illumination (ambient light or a special light source) to produce a visible image. Backlights are often used in smartphones, computer monitors, and LCD televisions. They are used in small displays to increase readability in low light conditions such as in wristwatches. [1]
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