Photography involves using a camera lens to take pictures, which are also known as photo images. A lens is used to focus light onto the camera's light-sensitive surface during exposure to create a digital image file. The photography and photo imaging industry workforce in the UK comprises around 43,100 people, mostly concentrated in London and the South East of England. The industry consists of 8,700 companies, most of which are sole traders or freelance photographers. Digital technology has significantly impacted the photography industry. It has improved photo quality, made cameras more accessible, and allowed for easier photo sharing. These changes have created more jobs and opportunities within the industry.