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

Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on amateur telescopes.

Different techniques of intraocular lens removal are required depending on the type of intraocular lens, the indication for removal, the location of the intraocular lens, and the presence of co ...

The aperture refers to the size of the iris (hole) within the lens. The bigger the hole, the more light gets into the camera. Aperture is measured in F-stops. A low number like F1.8 or F2.1 means ...

Engineering is all about trade-offs, and that’s especially true in VR headset design. Pancake lenses are compact units that rely on polarization to bounce light around internally, resulting in a ...

"Our computational techniques suggested we could design multi-level diffractive flat lenses with large apertures that could ...

Technique / 'How to use sigma 879101 tc 1401 1 4x teleconverter for canon sima 150 600mm lens' Techniques From lens focal lengths and fill-flash to portraits, macro or stunning landscapes there ...