A-Z v2 A B C D E F G H I J K L M N O P Q R S T U V W X Z 0-9 B Back button focusUsing a button on the back of the camera to activate autofocus, not the shutter button. Back illuminated sensorNewer, more efficient sensor design with the wiring on the back surface. BacklightingWhere the light is coming straight at the camera and through your subject. BackpackCamera bag designed like a rucksack, ideal for bulkier and heavier equipment. Ball headSimple tripod head which allows movement in any direction with a single locking knob. Barrel distortionWhere straight lines near the edge of a picture appear to bow outwards. BatteriesPower sources for cameras or other accessories, usually rechargeable. Battery chargerUsed for recharging batteries when they can be taken out of the device. Battery gripAdd on accessory to increase a camera's battery life and make vertical shooting easier. Battery lifeHow long a camera will run for between charges. Bayer sensorMost common type of sensor, where colors are captured by a 'Bayer' pattern of red, green and blue photosites. Bayonet mountTwist-lock mechanism for attaching and removing lenses quickly. BillinghamPrestige British maker of traditionally styled camera bags. Bits and bit depthThe amount of digital information used to capture, store and display digital photos. Black and whiteGenre of photography where colors are replaced by shades of grey, and still popular today. Black and white filtersFilters for changing the way colors are translated into shades of grey in black and white photography. BokehDescribes the visual appearance of out of focus areas in a photo. BoomPole or bar used to move microphones or cameras over a subject. Bounce flashFlash technique where the light is reflected off nearby walls or ceilings to soften its appearance. BracketingTaking multiple shots at different exposure settings, for example, to choose the best one later. Bridge cameraCamera with a very long zoom range designed for versatility and long range shooting. Brightline framesFraming marks used in cameras with simple 'direct vision' viewfinders. Brolly (lighting)An umbrella with a silvered interior, used to soften studio lighting. Buffer capacityNumber of shots that can be stored in the camera's short term memory during continuous shooting. Bulb (B) exposureShutter speed setting where the shutter stays open until you release the button. Burst modeMode where the camera takes pictures continuously while the shutter button is held down.