Sony could be about to launch it's longest-ever E-mount lens. If Sony Alpha Rumors is correct, Sony might be readying a ...

When you buy through links on our articles, Future and its syndication partners may earn a commission.

To find this out, multiply your lens's focal length by 1.5 if you're using an APS-C Nikon, Fujifilm or Sony camera, 1.6 if it ...

Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view." ...

and prime focal lengths. The company lists about 30 lenses on its site, all using the Micro Four Thirds mount. As with its bodies, Sony's lenses can be surprisingly light. Even its 400mm f/2.8 is ...