In a study published in Optics Express, a research group led by Prof. Fu Yuxi from Xi'an Institute of Optics and Precision ...

The Nanlux Evoke 5000B is being touted as the world's first 5000W Stormproof LED bi-color spotlight with Green/Magenta ...

If you have frames you love but lenses that are scratched or an old prescription, online services can help with shipping kits or pre-paid labels that allow you to mail in your glasses, get the ...

Images, and the devices that capture them, are my focus. I've covered cameras at PCMag for the past 13 years, which has given me a front row seat for the DSLR to mirrorless transition, the ...

Secondly, the velocity model is optimized, and the energy contribution weights of effective rays to the receiver point are calculated through the crosswell seismic Fresnel beam wave field forward ...

Placing the 4×4 element 4-port antenna at the focal length of the lens would provide maximum gain, but no beam steering by phase controle. Placing the antenna closer than the focal length would lower ...

China’s government-imposed secrecy allegedly prevented the project scientists from sharing key details, such as the power level of the beam, so it’s hard to gauge the test’s true significance.

Weekend travelers must steer clear of the Capital Beltway Inner Loop along Tysons in Virginia these next few days, as the “Big Beam Weekend” road project comes underway. The Virginia ...

The best lenses for bird photography will help you get close to birds and wildlife from a distance. I'm here to help you snap up the best buys. I feel that the best lenses for bird photography solve a ...

"Energy is power [multiplied by] time — so to get a given amount of energy from a beam, you either need very high power or you need to stay in the beam a long time." One such solution that was ...

The best lenses for astrophotography are just what you need to taking stunning shots of February's planetary parade or March's blood moon, a breathtaking total lunar eclipse. Want to get the best ...

But what are the best lenses for the Sony A7S III? In drawing up our list we’ve taken a few key factors into account. One is that this camera is likely to be used principally for video, so we’ve ...