The measurement of the acceptance angle of an optical fiber, which is the maximum angle at which the core of the fiber will take in light that will be contained within the core. Taken from the ...

Nikon Inc. announced the highly anticipated release of the NIKKOR Z 35mm f/1.2 S, a medium wide-angle prime lens with an ...

Equipped with a bright f/2.8 constant aperture, the RF16-28mm F2.8 IS STM is Canon’s second lens with constant aperture zoom ...

The new Canon RF 16-28mm F2.8 IS STM ultra-wide zoom lens is a smaller and cheaper alternative to Canon's pro L-series lenses ...