bayonet lockbayonet mountbeaded screenbeambeam of lightbeam patternbeam projectorbeam splitingbeam splitterbeam spreaderbeater mechanismbeater movementbeepbeepsbegining of shootingbellowsbellows sunshadebenzotriazolberkey colortranbest boybetween the lens shutterbevel gearbezelbi concave lensbi convex lensbi pack filmbi packingbiasbias trapbidirectionalbig close upbig spotbilateral recordingbillboardbinbinacularbinaural hearingbinaural reproductionbioscopebipackbipack magazinebipack printingbipack systembit partbit playerblack and white filmblack backing travelling matteblack celblack comedyblack frame