Bulb mode/setting (B) is a shutter speedThe time a camera sensor or film is exposed to light when taking a photo. option that you can select. It allows your shutter speedThe time a camera sensor or film is exposed to light when taking a photo. to be any length you choose: one second, one minute, 10minutes, etc. It often used to achieve the right exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time. for low-light situations like night photography. The Bulb setting usually requires that you hold down the camera’s shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake, or IBIS. release button during the entire exposureThe amount of light that reaches the film (or camera sensor). It determines how light or dark an image is. The exposure of an image is determined by the aperture, shutter speed, and film speed (ISO). During exposure, the sensors or chemicals on the film in analogue models, are subjected to the light outside the camera for a certain time., or sometimes press it twice. The Bulb name comes from the detachable rubber ‘bulb’ pneumatic shutterEither mechanical and/or electronic shutters are possible. Mechanical systems can use a leaf (or iris) shutter or curtain shutter. In digital cameras a third alternative is also possible: the electronic shutter. This works by activating and then deactivating the CCD so that no further light can be recorded, regardless of whether light is hitting the CCD. The shutter controls the exposure time, which can range from thousandths of a second to several minutes or more. Fast shutter speeds freeze action, slow speeds are more suited to stationary subjects. A tripod is recommended for slow exposure shots to avoid camera shake, or IBIS. releases that were used with early cameras.
