It was the size of a toaster and captured images at a resolution of 0.01 megapixels. It weighed in at a hefty 3.6kg (8lbs) and recorded the first black and white image onto a cassette tape – a process that took 23 seconds. These specifications might seem meagre to a modern reader. But the invention of the digital camera by Steven Sasson at Kodak in 1975 launched a revolution that has turned us all into photographers. Film cameras have pretty much been swept…