The F-number of a photographic lens is a measure of its light-gathering ability, and is expressed as its aperture diameter ...

There is also a tantalizing glimpse of the focus mechanism ... There is an excellent view of the aperture element though, and it is possible to see how the lens uses twelve metal leaves to ...

Laowa launched its Probe Zoom lens to market at this week's NAB Show, with two focal lengths available: 15-24mm T8 and ...