![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
A technique was developed to allow the use of external flash at image sensor exposure times lower than the manufacturer’s specified maximum sync speed of a compact digital camera. By correlating light meter measurements with brightness readings of a grey card, a method to use the digital camera image sensor to measure light from flash units was developed. The flash discharge curve was derived and integrated to develop a mathematical model for clipped flash output. Utilising experimental data, the model was validated and parameterised for flash units. A computer program was created to calculate settings for correct flash exposure.