It's controlled by a series of rotating blades that move in a way that allows varying amounts of light to pass through to the ...

Current smartphone photography relies on a fixed aperture, namely a defined size of hole for light to pass through between the lenses and the sensor. In an iPhone, the aperture is fixed ...

Portrait mode does this artificially, and the latest version is extremely good, but a variable aperture lens does it optically, which offers even better results – subject to a catch which I’ll ...